I got him on my second try with a level 8 jew. Would have beat him in my first try but didnt realize some of the bullets the agents shoot could be blocked
I used speed potions every turn with both characters (probably the best potion in the whole game) and i used my bar darts with a gross out mod to get him bleeding quickly. By time he brought the agents he was half way dead. Then i used bar darts some more to make them bleed as well. All the while im using professor choas with butters every chance i got.
Surely its the way im specced and what have you but that fight was cake consider all the horror stories i heard before going into it