I’m a level 155 MM who didn’t wash. I've done Water From The Spring Of Youth quest, half of Olaf quests, and am working through Reuel’s HP quests until they become only available daily. I currently have 10.3k hp but want more for higher level content. My MP is 3.8k. Can I take out some of that MP and put into HP or is it too late?
I am guessing you still can hp wash a bit, you will need to check your actual MP with APR. Your minimum MP is 2318 and each wash will take away 12 mp. So do the math yourself, (actual MP - 2318)/12 = the number of wash you can do
You can wash your MP into HP 126 times (126 APRs usage), so you will have the bare minimum MP for your character.