[TheLieka]

Ok, for a rules based fix:

add the line in red to .\common\ruletypes.h

RULE_CATEGORY( NPC )
RULE_INT ( NPC, MinorNPCCorpseDecayTimeMS, 450000 ) //level<55
RULE_INT ( NPC, MajorNPCCorpseDecayTimeMS, 1500000 ) //level>=55
RULE_BOOL (NPC, UseItemBonusesForNonPets, true)
RULE_REAL ( NPC, OOCRegen, 0 ) //Lieka Edit:  NPC Out of Combat Regen Percentage Per Tick
RULE_CATEGORY_END()

change these lines in the bool NPC::Process() function in .\zone\npc.cpp

		if(GetHP() < GetMaxHP()) {
			if(GetOwnerID()!=0 && !IsEngaged()) //pet
				SetHP(GetHP()+hp_regen+bonus+(GetLevel()/5));
			else
				SetHP(GetHP()+hp_regen+bonus);
		}

to

	float NPCOOCRegen = 0;
	if(RuleR(NPC, OOCRegen) >= 0){
		NPCOOCRegen += RuleR(NPC, OOCRegen);
		NPCOOCRegen *= 0.01;
		NPCOOCRegen *= GetMaxHP();
		}
		//Lieka Edit:  Fixing NPC regen.  NPCs should regen to full during a set duration, not based on their HPs.  Increase NPC's HPs by % of total HPs / tick.
		if((GetHP() < GetMaxHP()) && !IsPet()) {
			if(!IsEngaged()) //NPC out of combat
				SetHP(GetHP() + hp_regen + NPCOOCRegen);
			else
				SetHP(GetHP()+hp_regen);
		} else if(GetHP() < GetMaxHP() && GetOwnerID() !=0) {
			if(!IsEngaged()) //pet
				SetHP(GetHP()+hp_regen+bonus+(GetLevel()/5));
			else
				SetHP(GetHP()+hp_regen+bonus);
		} else SetHP(GetHP()+hp_regen);

Required SQL:

insert into rule_values values (0, 'NPC:OOCRegen', 0);

The NPC Out of Combat Regen correction is disabled by default. The NPC will regen the rule value percentage of hps per tick once the rule is set. (e.g. NPC:OOCRegen to 5, and the mob will regen 5% health per tick when out of combat).

Dax