Decidedly not in the straightforward category. Please don't try this at home.
Running an obvious comp with two delay characters + MC delay class didn't work; the team couldn't do enough DPT before Bahamut was impossible to delay at around 15% or so. It might be feasible to go with one delay character and Catura with some Qilins to try and kill with a lower turn count upon hitting 50%, but there's not a whole lot of room for error there and leaving Andira out of the frontline doesn't seem advisable; the boss does enough damage to necessitate healing outside of the three potions.
I noted Elysian having a delay subskill in my Lucilius solo, and that in my failed attempt here with Chaos Ruler, that harp Soul Soloist let delays hit again. The cooldown on Sheep Song might be longer than Stall's, but a mainhand that comes with a unique debuff success rate up weapon skill and enables Soul Soloist more than compensates for that.
The summon pool provides different angles of approach instead of going all-in on chucking more delays. Getting to use Delinquent Spirit owned after it'd been taking up space in my storage for two years waiting for an opportunity. Yurius 1 can proc the same local petrify, but spending meter fishing for that lowers his damage output and takes forever. Medusa was worth something like 3-4 additional turns in break on the first call, which beats slotting another Typhon.
The first 50% takes forever because debuff resist needs to be saved for when it really matters. Swapping Monika in helps a bit on that front, her stackable debuff missing sometimes later on isn't as much of a problem and her ougi damage is good.
The only ougi that's a problem through the first half is Wind of the End. Once is fine; that's what Andira's heal is for. Two, though, requires some improvisation.
After 50%, sac Korwa to Hyperdimension to get Yurius in. It's definitely a problem that he's the one without Korwa's buffs and not Monika since he has no evasion and takes a ton of damage, but swapping him in early and pressing 1 to speed things up doesn't work since it'll risk wasting good local debuffs on the harmless portion of the raid.
The only ougi that's safe to let off after 50% is normal through 26%. Reginleiv or Abdak Force is like getting three free delays, even if it hurts a bit and Andira's ougi isn't up to dodge tank it. Everything else needsto be delayed until break.
Yurius dying from autoattacks is a real concern here. Andira dodging helps since it isn't used for anything else, as is mirror image from Tiamat call.
Summons are free to use whenever, although I saved them for later in the run after delays built up enough resist that they're not quite safe to rely on anymore.
wind ship 8%/no reactor buff