sorry to disagree, but just dump all your NPCs, tank up your fighter...damn, your an archer. wait a second. ok, new plan..
go to the adventurers mart, and buy two protection from magic scrolls. (this _will_ make the kangaxx fight _much_ harder
) dump all your NPCs with the exception of ... korgan (hes a figher isnt he?) ) put prot from magic scroll on both of you and wade on in. i think the reward for that fight is the staff of the magi, which is only usable by mages, beggin the question ,why bother?