HP washing w/ Empathy MP?

Nice! Been a while since I've HP washed, but if you can add AP into MP with INT gear on and get a boost, could you add AP into MP, buy an AP reset, take MP out and add HP, then take out MP again and add STR/LUK/DEX for example? Or is there some weird thing about not being able to reset out of MP back into HP, since they're the same 'pool'?

Unless Nexon changed it, you could, as it was a part of "Double Washing".

Anyways, I'm glad to see that my INT equips still aren't totally obsolete.
Too bad it doesn't work for Demon Slayers