This is fun but I gotta be real. These numbers are unbalanced, at least for the knight. I've gotten to floor 10 and haven't used a single healing item.
Not sure if you played before the last update. It was even easier before to stack armour. I got to 100+, but now armour gets consumed with Divine Light and this is a good balancing. Sure, health potions are not that useful with Knights, but for Vampires are for sure very good. You can still have situations where Health Potions would save you even as a Knight though.