Larian Studios Forums Divinity: Original Sin 2 Divinity - Original Sin 2 - Suggestions and Feedback [Exploit] Comeback Kid

I'm pretty sure it doesn't reduce damage you take, just damages the enemy for a portion of the damage you take. That said, it's super strong regardless. I could see it going down to 8% a point or something. Pretty small change, but the reduction adds up (or rather, subtracts down :P)

I don't know how instantaneous the heal from pain reflection is. If you take physical and elemental damage (with no armor) at the same time, I'm not sure if you die or if the pain reflection heals you between each damage tick. Either way, it probably should only proc once a round.