IID_Heal interface is still available or not.
It is not needed to call for it every time code is asking if entity is healer.
IsHealer() is called from timer in Idle state, setup range queries, update range queries, UnitAi.prototype.Attack, UnitAI.prototype.FindWalkAndFightTargets
Timer in idle state itself is called often per match.
Reducing number of callings to engine for healer interface.