There's some food, but honestly at this level you shouldn't need to be casting this much to gain levels, the dps should be able to take over when you're out of mp. If you make it to 50, and have all your blm quests done, you rarely EVER run out of mp unless you're being a dick and stealing hate on purpose or something, so it might just be the level range, lower on mp until 40s. Then one you hit you will still need some gear with mp materia, and enmity minus on belt and brand.