Let ServerPacket Handle the writting of packet data.

Game/Entities/Player/Player.Combat.cs

@@ -376,11 +376,10 @@ namespace Game.Entities
 
             DuelComplete duelCompleted = new DuelComplete();
             duelCompleted.Started = type != DuelCompleteType.Interrupted;
-            duelCompleted.Write();
-            SendPacket(duelCompleted, false);
+            SendPacket(duelCompleted);
 
             if (duel.opponent.GetSession() != null)
-                duel.opponent.SendPacket(duelCompleted, false);
+                duel.opponent.SendPacket(duelCompleted);
 
             if (type != DuelCompleteType.Interrupted)
             {

Game/Entities/Player/Player.cs

@@ -982,9 +982,9 @@ namespace Game.Entities
         new PlayerAI GetAI() { return (PlayerAI)i_AI; }
 
         //Network
-        public void SendPacket(ServerPacket data, bool writePacket = true)
+        public void SendPacket(ServerPacket data)
         {
-            Session.SendPacket(data, writePacket);
+            Session.SendPacket(data);
         }
 
         //Time
@@ -5298,6 +5298,8 @@ namespace Game.Entities
             if (WorldConfig.GetBoolValue(WorldCfg.AlwaysMaxskill)) // Max weapon skill when leveling up
                 UpdateSkillsToMaxSkillsForLevel();
 
+            _ApplyAllLevelScaleItemMods(true); // Moved to above SetFullHealth so player will have full health from Heirlooms
+
             // set current level health and mana/energy to maximum after applying all mods.
             SetFullHealth();
             SetPower(PowerType.Mana, GetMaxPower(PowerType.Mana));
@@ -5306,8 +5308,6 @@ namespace Game.Entities
                 SetPower(PowerType.Rage, GetMaxPower(PowerType.Rage));
             SetPower(PowerType.Focus, 0);
 
-            _ApplyAllLevelScaleItemMods(true);
-
             // update level to hunter/summon pet
             Pet pet = GetPet();
             if (pet)

Game/Entities/Player/SceneMgr.cs

@@ -64,7 +64,7 @@ namespace Game.Entities
             playScene.Location = position;
             playScene.TransportGUID = GetPlayer().GetTransGUID();
 
-            GetPlayer().SendPacket(playScene, true);
+            GetPlayer().SendPacket(playScene);
 
             AddInstanceIdToSceneMap(sceneInstanceID, sceneTemplate);
 
@@ -91,7 +91,7 @@ namespace Game.Entities
 
             CancelScene cancelScene = new CancelScene();
             cancelScene.SceneInstanceID = sceneInstanceID;
-            GetPlayer().SendPacket(cancelScene, true);
+            GetPlayer().SendPacket(cancelScene);
         }
 
         public void OnSceneTrigger(uint sceneInstanceID, string triggerName)

Game/Entities/Player/SocialMgr.cs

@@ -94,8 +94,6 @@ namespace Game.Entities
             if (!player)
                 return;
 
-            packet.Write();
-
             AccountTypes gmSecLevel = (AccountTypes)WorldConfig.GetIntValue(WorldCfg.GmLevelInWhoList);
             foreach (var pair in _socialMap)
             {
@@ -114,7 +112,7 @@ namespace Game.Entities
                         continue;
 
                     if (player.IsVisibleGloballyFor(target))
-                        session.SendPacket(packet, false);
+                        session.SendPacket(packet);
                 }
             }
         }