A bard, actually using a song? Surely, you jest.

On a more serious note, bards that don't play foes even without a black mage are only making their own dps lower. Sure, it's not going to make or break an encounter, but several bard skills have an elemental aspect to them, so foes will up bard dps slightly, and it's based off mp, and bards always need mp, right? Bards that don't play foes even for themselves, or when there are several bards, really just kind of confuse me.