If you are forced to face the Abudctor Virgin bosses in Volcano Manor, here's a cheap method to defeat them: Equip a shield in your left hand with 100% Physical Damage Negation. In your right, a weapon with long reach like a Spear. Start the battle, run to the right side and jump up on top of the rocks. Guard with a shield the whole time and attack with spear. Replenish stamina and repeat.