Quote Originally Posted by Antanias View Post
MP usually stands for Magic Points, and some jobs in this game don't really use magic. Would it be possible to change MP into something like AP (Action Points) since they're tied to...you know, actions?
Not really. It usually stands for "Mana Points". And 'mana' stands for an interpersonal supernatural power in its real-world meaning. In fantasy settings, it is the go-to word for all sorts of unspecified energy source used for anything that should not be possible for whatever physical characteristics something possesses, or even the building block for physical aspects of given world.

In other words, MP is always correct regardless of context.