I agree with Diomer here, you should really have zero issues winning with that sort of firepower. This is what I used
Basic strat was Lunatic High + Shellga up immediately. Planet Protector up next. (May take a reset of two for them not to be dicks pre-mitigation). 1st Sentinel's Grimoire (RW) up at around first Orb, second at 3rd orb. Refresh everything as needed. Lifesiphon and Drain Strike away on Bahamut.
I saved SB's for orbs. Fire Blossom took care of adds for the most part (was hitting for 9999).
I would say if anything you're possibly taking too much AoE? Ruinga, Meteor, Kick and Bladeblitz seems overkill, especially when none of them are the best AoE for those adds (Fire Blossom is). Maybe switch Ruinga out for single target.
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