MP can be an issue depending on playstyle, party injuries, and if a Bard is present.

E.g. if you're weaving damage while keeping everyone alive, your MP is going drain around the second Shroud of Saints.
If you've needed to Raise anyone during combat, that will be a hit to the MP.
If you've needed to resort to Cure II to help folks bounce back from an avoidable attack (or more than one Medica/Medica II).