Body Temp, HP+20%, HP10%, Locomotion, Antibody, Jelly, Bright Eyes, Clear Headed, Auto-Regen and Auto-Potion. Some Ability you need.

You might want to change Dagger with Eiko, since she's powerful with healing, your white mage/summoner is to heal for the battle. If you're a big fun of Dagger, change Vivi for Eiko. If Freya can do 9999 damage with Dragon's Crest then have her, if not, it best to have Steiner change for Freya, Quina is useful here, I rather not talk about Amarant, Change Zidane for Freya if you need. My party is Zidane, Vivi, Eiko and Steiner.

Ultima Weapon isn't neccessary but kick-ass, it best to hold more stronger weapon.

Depends on your stat, strategy and knowledge about FFIX. You can beat them in level 1 somehow like someother try.