Blood Price kinda feel useless... with ~6000MP it only returns 88mp per hit taken... why not just make it a passive trait that gives DRK a chance to recover MP while using Grit.
kinda like PLD's block... has a % to block... and once block proc... ~25% dmg reduction
DARK's M pleasure sense... has a % to trigger M pleasure sense when hit... and once M pleasure sense proc... 5~10% MP recovery.