YES! finally fucking beat Odin Ultra.
It came down to the wire with 5/6 characters alive.
I tried like 15 times to do the rsw strategy but it kept dyign to some random shit or bad placement when odin moved. plus making the whole treck with a mage team to battle #5 was a nightmare.
Yeah, I resorted to the Red Starwhip method on Leviathan because I failed all the other gear check requirements (no Ice Capsules, no Levitation, not even O'pari).
I eventually managed to pull it off. Like four times (and a couple failures) because Leviathan is a jerk. It was the most stressful of the events I've attempted because I had proper bow users for Odin and rolled Grace for Bahamut. The margin of error of ensuring the survival of the Starwhip and requiring the boss to move in a way that would allow you to pincer three more times with the surviving reinforcements (especially taxing on Leviathan because you'd be letting an enemy who could Confuse one of your characters survive) was nerve-wrackingly specific. If I had any other option, I'd take it.
But I didn't so I'm grateful the Red Starwhip method exists. Even if it's hairpulling.
I'm sure Mistwalker is onto that strat (and Grace and other def-stacking strategies) because Bahamut moving before you get a turn seems to be a deliberate counter to pincering specific enemies to stack enough def debuffs. I still pulled off the Grace method reliably anyway though I wonder how people who didn't have at least four people who could tank Omega Bahamut's first Inferno handled it (I used my healers and casters). I know my Grace couldn't survive it.
And I've run 20-1 enough times that Orichacum is the only ore I'm lacking. So running Pudding Time is a lot of despair. Don't think 15-9 or whatever that boss that drops Orichacum is all that efficient either.