The funny thing for me is I always play an elf, and start fireballing the 50% physical res guy at level 4. Then once I level up once or twice he's dead. Next goes death gaze, then poison, then Magic res, and last counter fireball.
EDIT: Just won with a TRANSMUTER. Didn't even get Mystic Balance, although I did pull a Crystal Ball. Had to use Whupaz on the counter fireball guy

Won with my second to last fireball.
We made an expansion and it is awesome. Really, you should check it out, especially if you're looking for some extra challenge.
Download over at ddmod.weebly.com!