[Grandpa]

Or just change the passives already in place to make you regenerate more or give you more max FP in the first place. If you have both FP regenerating abilities that's 15 per round. Add capacity, that's 17. One level 60 youkai is taken care of. You basically can't summon any more or your FP will be destroyed, fast. Unless you're a Lich. Which I don't think is really fair to any other race that wants to summon. That's just me though.