Stacking up physical resist is your best bet. The gorgon has 50% base physical resist, so adding platemail to bring that to 70% is a big boost, which should let you absolutely destroy those zombies. Her +2 mana from kills means you can leave low-level opponents left behind as fuel for your BURNDAYRAZ to kill the tormented one rather easily.
I played it just now and won first try even without getting any resistance items. Used HALPMEH to level up quickly and leave low-level enemies alive. Killed the low-level enemies for free mana to roll through tormented one without using potions, then brute-forced Frank for the win.