Too many Walls and Doors.

[Banggugyangu]

Perhaps it is to stop tanks from pulling 2-3 sets of add at a time. Healers may of balked at that on a regular basis. I know I stopped healing dungeons a few yrs back due to tanks pulling more than they could control and then I got swarmed with adds..But then, that was just me, 1 healer and my experience. I do hear lots of healer chatter tho

*Laughs in Bloodwhetting*