Removed module projects because it can't work like that atm. Commented out package commands.

NadekoBot.Core/Modules/Xp/Common/FullUserStats.cs

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+using NadekoBot.Core.Services.Database.Models;
+
+namespace NadekoBot.Modules.Xp.Common
+{
+    public class FullUserStats
+    {
+        public DiscordUser User { get; }
+        public UserXpStats FullGuildStats { get; }
+        public LevelStats Global { get; }
+        public LevelStats Guild { get; }
+        public int GlobalRanking { get; }
+        public int GuildRanking { get; }
+
+        public FullUserStats(DiscordUser usr,
+            UserXpStats fullGuildStats, LevelStats global,
+            LevelStats guild, int globalRanking, int guildRanking)
+        {
+            this.User = usr;
+            this.Global = global;
+            this.Guild = guild;
+            this.GlobalRanking = globalRanking;
+            this.GuildRanking = guildRanking;
+            this.FullGuildStats = fullGuildStats;
+        }
+    }
+}

NadekoBot.Core/Modules/Xp/Common/LevelStats.cs

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+using NadekoBot.Modules.Xp.Services;
+using System;
+
+namespace NadekoBot.Modules.Xp.Common
+{
+    public class LevelStats
+    {
+        public int Level { get; }
+        public int LevelXp { get; }
+        public int RequiredXp { get; }
+        public int TotalXp { get; }
+
+        public LevelStats(int xp)
+        {
+            if (xp < 0)
+                xp = 0;
+
+            TotalXp = xp;
+
+            const int baseXp = XpService.XP_REQUIRED_LVL_1;
+
+            var required = baseXp;
+            var totalXp = 0;
+            var lvl = 1;
+            while (true)
+            {
+                required = (int)(baseXp + baseXp / 4.0 * (lvl - 1));
+
+                if (required + totalXp > xp)
+                    break;
+
+                totalXp += required;
+                lvl++;
+            }
+
+            Level = lvl - 1;
+            LevelXp = xp - totalXp;
+            RequiredXp = required;
+        }
+
+        public static LevelStats FromXp(int xp) => new LevelStats(xp);
+    }
+}