Spoiler how to win The Boss. Mighty Wizor is not so mighty 1 hit with one handed sword (and over 430 strength), and he is goner.
Mutant: Potion of grate power then Improve + Beast Form + Demon Form + Force. And Chameleon at the start just to survive this 5-6 turns. Then 1 hit and he is gone. OR use Desintegration with 430 ST he is gone anyway.