Of course it has to make or break the fight. Just like not having a tank, healer, or DD would.BRD Magic 1: I don't want to see this ability mandating the inclusion of bards into every single party I am in. I understand that there are plenty of MP regeneration tactics now, and with the alchemy revisions I imagine that Ethers will be more potent and useful. Sadly, if MP regeneration really becomes an issue, this ability by itself will solidify Bards as a requirement. Please make sure this is a BALANCED spell, that doesn't make or break a fight.
This only applies to encounters that matter though.