@CrimsonxxMana firstly you completely disregard how, with that kind of ability, the philosopher stone sent him back in time, if it's supposed to amplify abilities. plus, his plan involved appearing extremely weak and getting captured, maybe this is why he did things in a convoluted way with the...
@CrimsonxxMana your explanation completely ignores the reason he was abused in the first place, his healing is extremely painful for him and not exactly strong. and why it's painful? because he's forced to relive the experience of the trauma, therefore i fail to see how it's wrong to think that...