i think it would be better to start this off as its own class, as sharing a class between 2 jobs kind of messed some things up with stat distribution. since it has VIT as a secondary stat, it would require a whole new gear set up. it would also have to have self heal only abilities, with something about the deity they are sacrifing their blood to returning their strength worked into the classes backstory. it is very possible, and i really like the idea. considering the trade-off, the heals would have to be powerful to offset the dqamage it inflicts, or self-buffs could be implemented, along with strong dps spells, even if it uses something like cleric stance to accomplish that high dps. it would be a very interesting role, one that i could really get into