N9Lxv3
I think u should have him learn reversed curse technique, so that with the ability to heal himself, he'll be able to produce more blood. This would probably be a qualitative strength improvement, because the amount of blood he has in his body should be one of his techniques main weakness
He can have them both. Afterall, the domain expansion can only be a trump card for most people due to the sheer amount of energy it takes. Reversed curse energy can be used for most fights, while the domain can be a trump card.
N9Lxv3:True but I decided to have him learn how to use a domain as it is more useful. Then using Rct & his technique as it would be less effective in more long lasting battles compared to using a domain.