Scripts/Ulduar/Flame Leviathan: Make both dummy effects apply on the same target, and boost range of spell Pursue to 50000yds to prevent boss reseting during the encounter.

src/server/game/Spells/SpellMgr.cpp

@@ -2990,7 +2990,6 @@ void SpellMgr::LoadDbcDataCorrections()
             case 25425: // Shoot
             case 45761: // Shoot
             case 42611: // Shoot
-            case 62374: // Pursued
             case 61588: // Blazing Harpoon
             case 52479: // Gift of the Harvester
                 spellInfo->MaxAffectedTargets = 1;
@@ -3177,6 +3176,9 @@ void SpellMgr::LoadDbcDataCorrections()
                 break;
             // ULDUAR SPELLS
             //
+            case 62374: // Pursued (Flame Leviathan)
+                spellInfo->EffectRadiusIndex[0] = 28;   // 50000yd
+                break;
             case 63342: // Focused Eyebeam Summon Trigger (Kologarn)
                 spellInfo->MaxAffectedTargets = 1;
                 break;

src/server/scripts/Northrend/Ulduar/ulduar/boss_flame_leviathan.cpp

@@ -541,9 +541,6 @@ class boss_flame_leviathan : public CreatureScript
                 //! I also removed the spellInfo check
                 void DoBatteringRamIfReady()
                 {
-                    if (me->HasUnitState(UNIT_STAT_CASTING))
-                        return;
-
                     if (me->isAttackReady())
                     {
                         Unit* target = ObjectAccessor::GetUnit(*me, _pursueTarget);
@@ -1662,9 +1659,24 @@ class spell_pursue : public SpellScriptLoader
             {
                 targets.remove_if(FlameLeviathanPursuedTargetSelector(GetCaster()));
                 if (targets.empty())
+                {
                     if (Creature* caster = GetCaster()->ToCreature())
                         caster->AI()->EnterEvadeMode();
                 }
+                else 
+                {
+                    //! In the end, only one target should be selected
+                    _target = SelectRandomContainerElement(targets);
+                    FilterTargetsSubsequently(targets);
+                }
+            }
+
+            void FilterTargetsSubsequently(std::list<Unit*>& targets)
+            {
+                ASSERT(_target);
+                targets.clear();
+                targets.push_back(_target);
+            }
 
             void HandleScript(SpellEffIndex /*eff*/)
             {
@@ -1687,8 +1699,11 @@ class spell_pursue : public SpellScriptLoader
             void Register()
             {
                 OnUnitTargetSelect += SpellUnitTargetFn(spell_pursue_SpellScript::FilterTargets, EFFECT_0, TARGET_UNIT_SRC_AREA_ENEMY);
+                OnUnitTargetSelect += SpellUnitTargetFn(spell_pursue_SpellScript::FilterTargetsSubsequently, EFFECT_1, TARGET_UNIT_SRC_AREA_ENEMY);
                 OnEffectHitTarget += SpellEffectFn(spell_pursue_SpellScript::HandleScript, EFFECT_0, SPELL_EFFECT_APPLY_AURA);
             }
+
+            Unit* _target;
         };
 
         SpellScript* GetSpellScript() const