you said it would be too powerful. I take (in some cases) 8 hp damage at a time if the spell only recovers 3 then that's not overly helpful as a restorative option. Also I notice that the NPC doesn't seem to have a limit on their MP (I could be wrong) but it seemed they were able to use them constantly without pause. Final Fantasy 2 (US or FF4 Japan) made a great point of showing bosses had a MP limit (Fight Asura) cast wall on her and she'll keep using cure 4 until she runs out of MP