Poison, Paralysis, Burn, and Curse.
The 4 bottles that I have just thrown at the Tormentor are the 4 debuffs that can be inflicted against him. The other debuffs don't work on this guy like attack down, defense down, sleep, bleed, and many other debuffs that exist in the game. And the only thing that works are those four. Thankfully, three of them reduce the HP of the one inflicted with the debuff every second while the other one stops or completely immobilizes the one that got inflicted by it.
With the Tormentor already inflicted by the debuffs, the only thing I needed to do is to extend the duration of the debuffs as they are not permanent. Once the debuffs are extended, then that means the Tormentor has no method of removing them. As far as I know, the boss doesn't have any sort of cleansing or healing mechanic. He is a combat-focused boss and it seems healing is not part of his mechanic.
