Quote Originally Posted by Flying Mullet
And I'm sure you're doing this by this point in the game, but make sure you cast Haste on Rosa so she can get in there with the healing more often.
I wouldn't recommend that. IIRC, only Rosa can cast Haste, and every time you use her to cast Haste, that means one less Cure 4. (SPOILER)Zeromus uses Black Hole several times during the battle, and it remove all positive status spells, such as Protect, Shell, Reflect, Float, Haste etc.