if i remember correctly, uber D is immune to elemental and magic type of attacks? so that leaves physical. i.e bowzon, barbs, melee paladins? i found that a smiter was the best means of killing. my v/t was able to tank and smite against uber D with ease. also my barb stood up against uber D. of course with some mana pots and some juvies. but non the less i still killed. make sure the barb is equipped with a ebotd for the life steal/mana steal. also let the v/t or smiter have life tap and atleast 50% crushing blow, it works wonders.