diff --git a/commands/bonus.js b/commands/bonus.js
index 6ad439a..a3f789f 100644
--- a/commands/bonus.js
+++ b/commands/bonus.js
@@ -1,13 +1,19 @@
 exports.name = "bonus";
 exports.description =
     ":star: Sums and calculates bonus for player stat numbers.";
-exports.usage = "<<bonus <number> <number> [inf optional extra numbers]";
-exports.example = "<<bonus 100 100";
+exports.usage =
+    "CLIENT_PREFIX:bonus <number> <number> [inf optional extra numbers]";
+exports.example = "CLIENT_PREFIX:bonus 100 100";
 exports.hidden = false;
 exports.run = (client, message, args) => {
     let is1nan = false;
     if (!args[0])
-        return message.channel.send("Not enough arguments, consult <<help.");
+        return message.channel.send(
+            "Not enough arguments, consult CLIENT_PREFIX:help.".replaceAll(
+                "CLIENT_PREFIX:",
+                client.prefix
+            )
+        );
     args.forEach((arg) => {
         if (isNaN(parseInt(arg))) {
             is1nan = true;
@@ -16,7 +22,10 @@ exports.run = (client, message, args) => {
     });
     if (is1nan)
         return message.channel.send(
-            "You have provided invalid arguments to this command, please consult <<help."
+            "You have provided invalid arguments to this command, please consult CLIENT_PREFIX:help.".replaceAll(
+                "CLIENT_PREFIX:",
+                client.prefix
+            )
         );
     let sum = 0;
     args.forEach((arg) => {
diff --git a/commands/cat.js b/commands/cat.js
index f8153cb..a9547ae 100644
--- a/commands/cat.js
+++ b/commands/cat.js
@@ -1,16 +1,24 @@
 exports.name = "cat";
 exports.description = ":cat: Calculates boost for cat.";
-exports.usage = "<<cat <boost> <levels>";
-exports.example = "<<cat 80 120";
+exports.usage = "CLIENT_PREFIX:cat <boost> <levels>";
+exports.example = "CLIENT_PREFIX:cat 80 120";
 exports.hidden = false;
 exports.run = (client, message, args) => {
     if (!args[0] || !args[1])
-        return message.channel.send("Not enough arguments, consult <<help.");
+        return message.channel.send(
+            "Not enough arguments, consult CLIENT_PREFIX:help.".replaceAll(
+                "CLIENT_PREFIX:",
+                client.prefix
+            )
+        );
     let boost = parseInt(args[0]);
     let levels = parseInt(args[1]);
     if (isNaN(boost) || isNaN(levels))
         return message.channel.send(
-            "Boost or levels is not a number. Consult <<help."
+            "Boost or levels is not a number. Consult CLIENT_PREFIX:help.".replaceAll(
+                "CLIENT_PREFIX:",
+                client.prefix
+            )
         );
     let extraboost = Math.floor(levels / 3 - 3);
     let players = Math.floor(levels / 29) + 1;
diff --git a/commands/cb.js b/commands/cb.js
index 8bcf677..bbf139b 100644
--- a/commands/cb.js
+++ b/commands/cb.js
@@ -1,12 +1,17 @@
 exports.name = "cb";
 exports.description =
     ":crossed_swords: Calculate calamity blade damage taking in to account projectile speed.";
-exports.usage = "<<cb <damage> <ups> [projectile speed]";
-exports.example = "<<cb 10000 250 10000";
+exports.usage = "CLIENT_PREFIX:cb <damage> <ups> [projectile speed]";
+exports.example = "CLIENT_PREFIX:cb 10000 250 10000";
 exports.hidden = false;
 exports.run = (client, message, args) => {
     if (!args[0] || !args[1])
-        return message.channel.send("Not enough arguments, consult <<help.");
+        return message.channel.send(
+            "Not enough arguments, consult CLIENT_PREFIX:help.".replaceAll(
+                "CLIENT_PREFIX:",
+                client.prefix
+            )
+        );
     let cb = parseInt(args[0]);
     let ups = parseInt(args[1]);
     if (isNaN(cb) || isNaN(ups))
diff --git a/commands/estimate.js b/commands/estimate.js
index 3e26072..c3f1283 100644
--- a/commands/estimate.js
+++ b/commands/estimate.js
@@ -128,9 +128,10 @@ function weightedInterpolatePrice(pricesArr, inputNum, p = 2) {
 exports.name = "estimate";
 exports.description =
     ":money_with_wings: Give an estimated price of certain items in cv.";
-exports.usage = "<<estimate [summary of item you want the price of]";
+exports.usage =
+    "CLIENT_PREFIX:estimate [summary of item you want the price of]";
 exports.example =
-    "<<estimate 1600 ab2\n<<estimate 1100 thp\n<<estimate 2400 app builder staff\n(you can also include `showtable` anywhere to show raw price data)\n(always put number first, do not put conflicting data to avoid confusion)";
+    "CLIENT_PREFIX:estimate 1600 ab2\nCLIENT_PREFIX:estimate 1100 thp\nCLIENT_PREFIX:estimate 2400 app builder staff\n(you can also include `showtable` anywhere to show raw price data)\n(always put number first, do not put conflicting data to avoid confusion)";
 exports.hidden = false;
 exports.run = async (client, message, args) => {
     if (!args[0]) {
@@ -139,7 +140,7 @@ exports.run = async (client, message, args) => {
             tbl += p.returnKeyWord + "\n";
         });
         return message.channel
-            .send(`Available items in pricing table:\n\`\`\`\n${tbl}\`\`\`\nFor usage, consult \`<<help estimate\`
+            .send(`Available items in pricing table:\n\`\`\`\n${tbl}\`\`\`\nFor usage, consult \`CLIENT_PREFIX:help estimate\`.replaceAll("CLIENT_PREFIX:", client.prefix)
             `);
     }
     const combined = args.join(" ");
@@ -156,7 +157,10 @@ exports.run = async (client, message, args) => {
     });
     if (!gameValue) {
         return message.channel.send(
-            "You didn't include any numbers in your query. Try again or consult `<<help estimate`."
+            "You didn't include any numbers in your query. Try again or consult `CLIENT_PREFIX:help estimate`.".replaceAll(
+                "CLIENT_PREFIX:",
+                client.prefix
+            )
         );
     }
     priceTable.forEach((price, idx) => {
@@ -200,6 +204,9 @@ exports.run = async (client, message, args) => {
         }
     } else
         message.channel.send(
-            "Your query couldn't be matched with anything, please refine your query or reffer to `<<help estimate` or use `<<estimate` to see all available price tables for more information."
+            "Your query couldn't be matched with anything, please refine your query or reffer to `CLIENT_PREFIX:help estimate` or use `CLIENT_PREFIX:estimate` to see all available price tables for more information.".replaceAll(
+                "CLIENT_PREFIX:",
+                client.prefix
+            )
         );
 };
diff --git a/commands/ev.js b/commands/ev.js
new file mode 100644
index 0000000..b36477d
--- /dev/null
+++ b/commands/ev.js
@@ -0,0 +1,113 @@
+const BASEDMG = 1e9; // absurdly high to avoid base damage bottleneck
+
+function getHeroDamageScaling(statVal) {
+    return (
+        1.0 +
+        0.33 *
+            (Math.pow(4.0, 0.1 * 1.1) -
+                1.0 +
+                0.68 * (Math.pow(statVal + 1, 0.375 * 1.1) - 1.0))
+    );
+}
+
+function getAb2Scaling(statVal) {
+    return (
+        1.0 +
+        0.66 * (Math.pow(4.0, 0.0825) - 1.0) +
+        0.75 * (Math.pow(statVal + 1, 0.3375) - 1.0)
+    );
+}
+
+function getTotalDamage(hdmgStat, baseDamage) {
+    return Math.max(
+        Math.max(32.0, Math.max(1.0, baseDamage)) *
+            getHeroDamageScaling(hdmgStat) *
+            (1.2 * 0.8 * 0.155),
+        1.0
+    );
+}
+
+function getBeamDamage(hdmg, ab2) {
+    return (
+        getTotalDamage(hdmg, BASEDMG) * 0.6 * Math.pow(getAb2Scaling(ab2), 0.93)
+    );
+}
+
+/**
+ * Find optimal split of totalStats between hdmg and ab2
+ * using a binary/golden section search.
+ */
+function findOptimalDistribution(totalStats) {
+    let left = 0;
+    let right = totalStats;
+    const phi = (Math.sqrt(5) - 1) / 2; // golden ratio for faster convergence
+    let x1 = right - phi * (right - left);
+    let x2 = left + phi * (right - left);
+
+    while (Math.abs(right - left) > 1e-3) {
+        const f1 = getBeamDamage(x1, totalStats - x1);
+        const f2 = getBeamDamage(x2, totalStats - x2);
+
+        if (f1 < f2) {
+            left = x1;
+            x1 = x2;
+            x2 = left + phi * (right - left);
+        } else {
+            right = x2;
+            x2 = x1;
+            x1 = right - phi * (right - left);
+        }
+    }
+
+    const hdmg = (left + right) / 2;
+    const ab2 = totalStats - hdmg;
+    return {
+        hdmg: hdmg,
+        ab2: ab2,
+    };
+}
+
+exports.name = "ev";
+exports.description =
+    ":robot: Calculate how much hero damage/ab2 you should aim for.";
+exports.usage =
+    "CLIENT_PREFIX:ev <hdmg> <ab2> OR CLIENT_PREFIX:ev <total stats>";
+exports.example = "CLIENT_PREFIX:ev 6000 5000\nCLIENT_PREFIX:ev 10000";
+exports.hidden = false;
+exports.run = (client, message, args) => {
+    if (!args[0])
+        return message.channel.send(
+            "Not enough arguments, consult CLIENT_PREFIX:help.".replaceAll(
+                "CLIENT_PREFIX:",
+                client.prefix
+            )
+        );
+    let total = parseInt(args[0]);
+    if (isNaN(total))
+        return message.channel.send(
+            "One of the arguments is not a number. Consult CLIENT_PREFIX:help.".replaceAll(
+                "CLIENT_PREFIX:",
+                client.prefix
+            )
+        );
+    if (args[1]) {
+        if (isNaN(parseInt(args[1]))) {
+            return message.channel.send(
+                "One of the arguments is not a number. Consult CLIENT_PREFIX:help.".replaceAll(
+                    "CLIENT_PREFIX:",
+                    client.prefix
+                )
+            );
+        } else total += parseInt(args[1]);
+    }
+
+    const distribution = findOptimalDistribution(total);
+
+    message.channel.send(
+        `You should aim for **${
+            Math.round(distribution.hdmg) - 3
+        }** hero damage and **${
+            Math.round(distribution.ab2) + 3
+        }** ab2. *(approximately)*`
+    );
+};
diff --git a/commands/hb.js b/commands/hb.js
index f83de3f..b3f0e12 100644
--- a/commands/hb.js
+++ b/commands/hb.js
@@ -27,16 +27,24 @@ function get_damage_multiplier(stat_val) {
 
 exports.name = "hb";
 exports.description = ":muscle: Calculate hero boost's damage multiplier.";
-exports.usage = "<<hb <points>";
-exports.example = "<<hb 5000";
+exports.usage = "CLIENT_PREFIX:hb <points>";
+exports.example = "CLIENT_PREFIX:hb 5000";
 exports.hidden = false;
 exports.run = (client, message, args) => {
     if (!args[0])
-        return message.channel.send("Not enough arguments, consult <<help.");
+        return message.channel.send(
+            "Not enough arguments, consult CLIENT_PREFIX:help.".replaceAll(
+                "CLIENT_PREFIX:",
+                client.prefix
+            )
+        );
     let hbPoints = parseInt(args[0]);
     if (isNaN(hbPoints))
         return message.channel.send(
-            "Given argument is not a number. Consult <<help."
+            "Given argument is not a number. Consult CLIENT_PREFIX:help.".replaceAll(
+                "CLIENT_PREFIX:",
+                client.prefix
+            )
         );
 
     message.channel.send(
diff --git a/commands/help.js b/commands/help.js
index 47e8651..26ecc2f 100644
--- a/commands/help.js
+++ b/commands/help.js
@@ -2,8 +2,8 @@ const { EmbedBuilder } = require("discord.js");
 exports.name = "help";
 exports.description =
     ":scroll: Shows this message and provides insight into other commands.";
-exports.usage = "<<help [optional other command]";
-exports.example = "<<help res";
+exports.usage = "CLIENT_PREFIX:help [optional other command]";
+exports.example = "CLIENT_PREFIX:help res";
 exports.hidden = false;
 exports.run = (client, message, args) => {
     let embed = new EmbedBuilder();
@@ -12,7 +12,10 @@ exports.run = (client, message, args) => {
         const cmd = client.commands.get(args[0]);
         if (!cmd)
             return message.channel.send(
-                "Command not found, try `<<help` first."
+                "Command not found, try `CLIENT_PREFIX:help` first.".replaceAll(
+                    "CLIENT_PREFIX:",
+                    client.prefix
+                )
             );
         if (cmd.hidden && message.author.id != client.ownerID) return;
         embed.setTitle(`Help for \`${cmd.name}\` command`);
@@ -20,11 +23,11 @@ exports.run = (client, message, args) => {
         embed.addFields(
             {
                 name: "Usage",
-                value: cmd.usage,
+                value: cmd.usage.replaceAll("CLIENT_PREFIX:", client.prefix),
             },
             {
                 name: "Example",
-                value: cmd.example,
+                value: cmd.example.replaceAll("CLIENT_PREFIX:", client.prefix),
             }
         );
     } else {
@@ -34,7 +37,10 @@ exports.run = (client, message, args) => {
                 if (cmd.hidden && message.author.id != client.ownerID) return;
                 embed.addFields({
                     name: cmd.name,
-                    value: cmd.description,
+                    value: cmd.description.replaceAll(
+                        "CLIENT_PREFIX:",
+                        client.prefix
+                    ),
                 });
             });
     }
diff --git a/commands/ms.js b/commands/ms.js
index 20e0a09..451b492 100644
--- a/commands/ms.js
+++ b/commands/ms.js
@@ -1,12 +1,17 @@
 exports.name = "ms";
 exports.description =
     ":tada: Calculate moon staff damage taking in to account projectile speed.";
-exports.usage = "<<ms <elemental damage> <ups> [projectile speed]";
-exports.example = "<<ms 10000 250 10000";
+exports.usage = "CLIENT_PREFIX:ms <elemental damage> <ups> [projectile speed]";
+exports.example = "CLIENT_PREFIX:ms 10000 250 10000";
 exports.hidden = false;
 exports.run = (client, message, args) => {
     if (!args[0] || !args[1])
-        return message.channel.send("Not enough arguments, consult <<help.");
+        return message.channel.send(
+            "Not enough arguments, consult CLIENT_PREFIX:help.".replaceAll(
+                "CLIENT_PREFIX:",
+                client.prefix
+            )
+        );
     let moonstaff = parseInt(args[0]);
     let ups = parseInt(args[1]);
     if (isNaN(moonstaff) || isNaN(ups))
diff --git a/commands/ping.js b/commands/ping.js
index 1528358..8962f3f 100644
--- a/commands/ping.js
+++ b/commands/ping.js
@@ -11,8 +11,8 @@ function format(seconds) {
 
 exports.name = "ping";
 exports.description = ":ping_pong: View service statistics.";
-exports.usage = "<<ping";
-exports.example = "<<ping";
+exports.usage = "CLIENT_PREFIX:ping";
+exports.example = "CLIENT_PREFIX:ping";
 exports.hidden = true;
 exports.run = async (client, message, args) => {
     message.channel.send("Fetching data...").then((m) => {
diff --git a/commands/refetch.js b/commands/refetch.js
index 1d81e3e..fb47061 100644
--- a/commands/refetch.js
+++ b/commands/refetch.js
@@ -1,7 +1,7 @@
 exports.name = "refetch";
 exports.description = ":ninja: Refetch user react data.";
-exports.usage = "<<refetch";
-exports.example = "<<refetch";
+exports.usage = "CLIENT_PREFIX:refetch";
+exports.example = "CLIENT_PREFIX:refetch";
 exports.hidden = true;
 exports.run = async (client, message, args) => {
     if (message.author.id != client.ownerID) return;
diff --git a/commands/res.js b/commands/res.js
index 105aa0a..7c0a29f 100644
--- a/commands/res.js
+++ b/commands/res.js
@@ -2,8 +2,8 @@ exports.name = "res";
 exports.description =
     ":shield: Calculates how much upgrades you need to max your resistances. For Ult pieces and better. (slightly inaccurate but this is hard to calculate)";
 exports.usage =
-    "<<res <res> <res> <res> [res] | <hero stat> <levels> [second hero stat]";
-exports.example = "<<res -3 1 -16 14 | 406 440";
+    "CLIENT_PREFIX:res <res> <res> <res> [res] | <hero stat> <levels> [second hero stat]";
+exports.example = "CLIENT_PREFIX:res -3 1 -16 14 | 406 440";
 exports.hidden = false;
 exports.run = (client, message, args) => {
     for (let i = 0; i < args.length; i++) {
diff --git a/commands/tb.js b/commands/tb.js
index 521b9ab..0d4883d 100644
--- a/commands/tb.js
+++ b/commands/tb.js
@@ -28,16 +28,24 @@ function get_damage_multiplier(stat_val) {
 
 exports.name = "tb";
 exports.description = ":fire: Calculate tower boost's damage multiplier.";
-exports.usage = "<<tb <points>";
-exports.example = "<<tb 5000";
+exports.usage = "CLIENT_PREFIX:tb <points>";
+exports.example = "CLIENT_PREFIX:tb 5000";
 exports.hidden = false;
 exports.run = (client, message, args) => {
     if (!args[0])
-        return message.channel.send("Not enough arguments, consult <<help.");
+        return message.channel.send(
+            "Not enough arguments, consult CLIENT_PREFIX:help.".replaceAll(
+                "CLIENT_PREFIX:",
+                client.prefix
+            )
+        );
     let tbPoints = parseInt(args[0]);
     if (isNaN(tbPoints))
         return message.channel.send(
-            "Given argument is not a number. Consult <<help."
+            "Given argument is not a number. Consult CLIENT_PREFIX:help.".replaceAll(
+                "CLIENT_PREFIX:",
+                client.prefix
+            )
         );
 
     message.channel.send(
diff --git a/index.js b/index.js
index 972ec6e..20177c5 100644
--- a/index.js
+++ b/index.js
@@ -20,6 +20,7 @@ const client = new Client({
 });
 client.commands = new Collection();
 client.ownerID = 263247134147608578;
+client.prefix = prefix;
 
 fs.readdir("./commands/", (err, files) => {
     if (err) return console.error(err);
@@ -73,8 +74,13 @@ client.on(Events.MessageCreate, async (message) => {
     const cmd = client.commands.get(command);
 
     if (!cmd) return;
-
-    await cmd.run(client, message, args);
+    try {
+        await cmd.run(client, message, args);
+    } catch (e) {
+        message.channel.send(
+            "Command " + cmd.name + " exited with an exception: " + e
+        );
+    }
 });
 
 // Log in to Discord with your client's token
diff --git a/old.js b/old.js
index 46d783a..6972401 100644
--- a/old.js
+++ b/old.js
@@ -28,7 +28,7 @@ client.on(Events.MessageCreate, (message) => {
         return message.channel.send("not implemented.");
         if (!args[0] || !args[1])
             return message.channel.send(
-                "Not enough arguments, consult <<help."
+                "Not enough arguments, consult CLIENT_PREFIX:help."
             );
         let ab1 = parseInt(args[0]);
         let ab2 = parseInt(args[1]);
@@ -42,7 +42,7 @@ client.on(Events.MessageCreate, (message) => {
         return message.channel.send("not implemented.");
         if (!args[0] || !args[1])
             return message.channel.send(
-                "Not enough arguments, consult <<help."
+                "Not enough arguments, consult CLIENT_PREFIX:help."
             );
         let ab1 = parseInt(args[0]);
         let ab2 = parseInt(args[1]);
@@ -57,7 +57,7 @@ client.on(Events.MessageCreate, (message) => {
     if (command == "ms") {
         if (!args[0] || !args[1])
             return message.channel.send(
-                "Not enough arguments, consult <<help."
+                "Not enough arguments, consult CLIENT_PREFIX:help."
             );
         let cb = parseInt(args[0]);
         let ups = parseInt(args[1]);
@@ -209,7 +209,7 @@ client.on(Events.MessageCreate, (message) => {
     if (command == "cat") {
         if (!args[0] || !args[1])
             return message.channel.send(
-                "Not enough arguments, consult <<help."
+                "Not enough arguments, consult CLIENT_PREFIX:help."
             );
         let boost = parseInt(args[0]);
         let levels = parseInt(args[1]);
@@ -225,7 +225,7 @@ client.on(Events.MessageCreate, (message) => {
     if (command == "bident") {
         if (!args[0] || !args[1])
             return message.channel.send(
-                "Not enough arguments, consult <<help."
+                "Not enough arguments, consult CLIENT_PREFIX:help."
             );
         let damage = parseInt(args[0]);
         let ups = parseInt(args[1]);
@@ -250,7 +250,7 @@ client.on(Events.MessageCreate, (message) => {
     if (command == "cdrag") {
         if (!args[0] || !args[1] || !args[2])
             return message.channel.send(
-                "Not enough arguments, consult <<help."
+                "Not enough arguments, consult CLIENT_PREFIX:help."
             );
         let damage = parseInt(args[0]);
         let upgrades = parseInt(args[1]);
@@ -270,19 +270,19 @@ client.on(Events.MessageCreate, (message) => {
         embed.addFields(
             {
                 name: "cat",
-                value: ":cat: Calculates boost for cat. (<<cat <boost> <levels>)",
+                value: ":cat: Calculates boost for cat. (CLIENT_PREFIX:cat <boost> <levels>)",
             },
             {
                 name: "cdrag",
-                value: ":dragon: Calculate damage for crystaline dragon taking into account upgrades and additional projectiles. (<<cdrag <base> <ups> <extra projectiles>)",
+                value: ":dragon: Calculate damage for crystaline dragon taking into account upgrades and additional projectiles. (CLIENT_PREFIX:cdrag <base> <ups> <extra projectiles>)",
             },
             {
                 name: "cb",
-                value: ":crossed_swords: Calculate calamity blade damage taking in to account speed. (<<cb <damage> <ups> [proj speed])",
+                value: ":crossed_swords: Calculate calamity blade damage taking in to account speed. (CLIENT_PREFIX:cb <damage> <ups> [proj speed])",
             },
             {
                 name: "bident",
-                value: ":trident: Calculate bident damage taking in to account speed and charge speed. (<<bident <damage> <ups> [proj speed] [charge speed])",
+                value: ":trident: Calculate bident damage taking in to account speed and charge speed. (CLIENT_PREFIX:bident <damage> <ups> [proj speed] [charge speed])",
             },
             {
                 name: "ms",