So any reason you are suggesting to kill the handlers first in UK on protodragons? I found they do negligible damage to my casters (healing stream totems pretty much cover their damage) and the proto-drake can do some massive damage fast if he breaths fire and immediately melees ( about 12kish damage). I wouldn't want to let him live long and I take him out first and just ignore the adds. Once hes down the tank can handle 2 of the handlers with ease.