I barely scraped by the fight by S/L a ton in the first half. I can burst down one of the twins easy (following /u/krissco strategy that was posted to my request for help. Dunno how to link it so here it is, see below), then S/L until the second doesn't cast aoe (he can be burst down in 1-2 turns). His strategy is pretty crazy since the only mitigation is shellga.

I managed it with two of the +++ rods by using a stacking-buff RW (Maria's Song). setup and status The fight went something like this: Turn 1: Shellga, Meteor, Chain Blizzaga, Haste Vivi, Faith Vivi Turn 2: Maria's Song, Meteor, Chain Blizzaga, Haste Kuja, Faith Kuja Turn 3: Saint's Cross, Meteor, CB, Heal, Haste self Turn 4: Saint's Cross, Meteor (zorn dead), Chain Blizzaga, Heal, Heal Turn 5: Maria's Song, Chain Firaga, CB, Heal, Heal Turn 6: SC (thorn dead), CF, Meltdown, Heal, Heal Turn 7: SC, CF, Meltdown, Shared AoE Heal, Heal Turn 8: SC, CF, CB (Melti dead) He never got a chance to cast bio on my winning run. I have well-honed 5* abilities and still, this was HARD without synergy. Good luck!