I generally get 2nd place in DPS as a BLM, only second to a good melee/summoner. Fights like Turn 6 and 7 are somewhat a nightmare, even with minimal movement it significantly lowers my DPS. Fights like T8 where I barely have to move for example, I'm pulling around 350~ DPS, 2nd place behind a monk. Turn 9 I get pretty good DPS, only because I'm aware of when to pop Raging Strikes and knowing when Nael is going to jump, positioning myself so that I don't get casts interrupted, etc. But it's more work for less reward, than say a Dragoon who only has to make sure a couple DoTs and a buff is applied to himself constantly. Getting respectable DPS on a Black Mage is more work than obtaining it from any other class.

I'm glad this buff is coming out. Black Mage was always labeled as a DPS with minimal utility, and thus should have high damage to show for it. When you must sit like a turret and cast spells in a game where dodging attacks every 5 seconds otherwise you die is the norm, there should be something to compensate. All they'd have to do is slightly increase Thunder damage/thundercloud proc chance, slightly increase Fire 1 potency, or stack Firestarters for later use (when in movement).