Omega Weapon

[The Anarchy Angel]

It's just all you have to survive up to the point where you can start putting your strategy into place! Begin battle by equpping as many of your three as possible with Initiative, especially one with 100% affection towards Cerberus. Make sure he goes first before the others take their turns. If you think you can hold on until Cerberus has been summoned, wait, if not, use Defend. Once Cerberus has been summoned, immidiately cast triple meltdown, aura and regen. Once Medigo Flame has been cast, spend your next turn either defending or healing, make sure to have at least two people defending in time for Terra Break.
Sometimes, you get an extra turn in which to do this if Omega casts lv5 Death (100xDeath to Status J should guard you entirely), which will make the match easier. Once you get into a system, have one person constantly defending or re casting magic and then if needed healing. Eventually if you punish him with Duel (booya punchrush or punchrush booya constantly) and a few Lionhearts...he should crack, eventually

[JulioA]

I had 100 Hero Drinks, so just used those over and over again. I found it real cheap, and swore to go back and beat it the right way, but am always caught up playing another FF.

[The Anarchy Angel]

Hmm, oh by the way about its little loop it does: LV5 Death -> Meteor -> Medigo Flame -> Gravija -> Terra Break -> Normal attacksor Ultima -> Light Pillar. Then the cycle repeats itself over and over until you kill it.