It is very specific, but possible. You do need the buffed knife, or it will be a slog using the baseball bat.
Phase 1, Enchanted Knife until 30 or 40 hp. The boss will re-apply armor. Equip Bible and Defend spam to full, then finish the phase 1 with a broken glass bottle.
Phase 2, throw the tome. Then torch spam. Heal just before you die. With enough HP it is straightforward.