Here my experience and please share yours about ultor in this dungeon and also your best team to beat the tanker in lvl 3 dungeon. I try to use Zultor as friend lead and the result is you don't need to be worry to get hit from the boss because after you cast the BB all single attack of the boss will taken by ultor and it only 1-2 damage but becareful of paralysis and AoE damage. You need BC generation to keep you cast BB every turn and I suggest Lily Matah.Why? Because ultor taken all damage, so just bring Lily lead and ULTOR lead. The rest of team is mono water (crit type like mariudeth is recommended). Bring some potion and paralysis cure. How about yours? Is the ultor help you?