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I dunno. I've seen some pretty gnarly Mystic Boons returning hundreds of MP (not to mention that includes damage to the mob). Much much more efficient than resting with hMP gear if you ask me. Of course a meleeing white mage is very conditional especially when it comes to the type of mob you're fighting.

The only major downside is there isn't much variety of mobs that don't have those "I KEEL YOU" TP moves.