I recently played FF9 for the tenth time or so, and this time I was able to kick Ozma at the lowest level so far. I only relied upon Freya's Dragon Crest to do damage. You honestly don't need more. And I had Egoist Armlet, or Ninja Gear to absorb Doomsday. So anyway, because I only used one attacker, I was able to have two slots of healers (Dagger, Eiko), which honestly saved my butt a few times. I also had Protect Rings with three of the characters, and the fourth had a Ribbon instead (didn't have 4 protect rings). I was feeling lucky (and terribly greedy), so I used Zidane solely for stealing Ozma's goodies.

On to the battle. Thanks to my low average level (around 50-60), his Flare Star was fairly weak. No one died of it, and since I always had atleast one of the healers on stand by, I could easily have time to cast a Curaga after it. Same with Curse, I had protections against confusion and poison, and it doesn't matter if you're mini, so no need to remedy/esuna that. The Curse did quite a lot damage, but like I said, always had time to heal right after one. So, Zidane steals, Eiko and Dagger are on stand-by until healing is required, and Freya uses Dragon Crest.

Ozma had one attack that could wipe out my entire party, though. Meteor. The bastard did 9999 damage on all of my buddies, leaving no one alive. He used it twice though, which is not too much, and thanks to my lucky star, my 99 Pheonix Pinions payed off. I got Rebirth Flame triggered BOTH times I died! The second time was when I had finished stealing everything, and Ozma had no more than 4000 HP left... so when he cast Meteor that one, my mouth fell open and I wanted to destroy something. But I got that life-saving Rebirth Flame a second time! Yay!

Anyway, that's it. After Zidane had finished stealing all the stuff, I used his Thievery to inflict a bit more damage aswell as the Dragon's Crest, and then Ozma was dead in a few minutes.

The abilities I had equipped were mainly just Auto-Regen, Auto-Haste, Antibody, Clear Headed, and Zidane had his Master Thief and Bandit abilities aswell.