Improving rules against raid group buffing from high lvl chars

L2_GameServer/java/net/sf/l2j/gameserver/model/L2Character.java

@@ -5902,10 +5902,19 @@ public abstract class L2Character extends L2Object
 
 					// Check Raidboss attack and
 					// check buffing chars who attack raidboss. Results in mute.
-					L2Object target2 = target.getTarget();
-					if ((target.isRaid() && getLevel() > target.getLevel() + 8)
-							|| (target2 instanceof L2Character && (((L2Character)target2).isRaid() 
-							&& getLevel() > ((L2Character)target2).getLevel() + 8)))
+					L2Character targetsAttackTarget = target.getAI().getAttackTarget();
+					L2Character targetsCastTarget = target.getAI().getCastTarget();
+					if (
+							(target.isRaid() && getLevel() > target.getLevel() + 8)
+							||
+							(!skill.isOffensive() && targetsAttackTarget != null && targetsAttackTarget.isRaid() 
+									&& targetsAttackTarget.getAttackByList().contains(target) // has attacked raid
+									&& getLevel() > targetsAttackTarget.getLevel() + 8)
+							||
+							(!skill.isOffensive() && targetsCastTarget != null && targetsCastTarget.isRaid() 
+									&& targetsCastTarget.getAttackByList().contains(target) // has attacked raid
+									&& getLevel() > targetsCastTarget.getLevel() + 8)
+					)
 					{
 						if (skill.isMagic())
 						{