Hey, it's me again, the guy that needed your help to beat Adel. Well, this guy didn't know how hard Ultimecia was going to be. Yes, I need help again. Sorry 'bout that. Any tips, strategies, recommended levels to be at, etc. are definitely much appreciated.
I suppose I should inform you all of my strategy. For form 1, I mostly have Quistis cast Demi and Squall use Diablos. It is finished pretty easily. For form 2, I immediately have Squall cast Meltdown so the battle doesn't take forever and have Selphie summon Cerberus. To keep myself safe, I have Selphie cast Aura on herself and then scroll through until I get her to cast Wall on all of my characters (it really helps after that sonic attack, whatever it's called). As far as attacking goes, Quistis will often triple-cast Holy and I will have Aura and Haste on Squall for his Renzokuken. It's finished pretty easily and on to form 3. Pretty much same strategy. I try to always have Wall and Regen on my characters, as it helps loads. Aura on Squall etc. Form 4. Meltdown of course. Try to always have Regen on, but Ultimecia constantly will blow away my magic stocks (and it's possible that Regen will get blown away. Oh well.). No need for Aura really, since the one attack will always bring my health to 1 (that's what the Regen is for. When this happens, I try to get in Quisty's limit as well as Squall's, then go to Selphie for Full-Cure. The Apocalypse attack is where it really gets to be a bitch. I have to say that is what has killed me every time...