Ultimate battles/Cid Missions done. Full-medaled the Turks, lost one medal on damage to U+ Sephiroth. Setups as below.
Turks
L75 Cait Sith (Heathen Frolic Sarabande R3/Multibreak R2 - Dr. Mog's Teachings)
L80 Red XIII (Power Breakdown R4/Mental Breakdown R4 - Mako Might)
L80 Aerith (Curaja R5/Shellga R2 - Ace Striker)
L80 Reno (Meteor R3/Darkra R4 - Vow of Vengeance)
L80 Vincent (Memento Mori R3/Alexander R5 - Devotion)
Lulu Focus RW
Since almost all of my FF7 offensive synergy is magical in nature (including a Striking Staff that went, unsurprisingly, to Vincent), I decided to go full mage meta here. Honestly, feels like the way to go if you have the hones and stackable breakdown mitigation - the Turks are individually fragile and you can really speed up the fight if you can pull it off. Entice hit Vincent once, which was annoying, and I spent the entire fight individually healing people because the opening turns are a pain in the ass, but once Elena went down, things went smoothly. Vincent was dropping 20k damage Alexanders with Memento Mori + Focus, which was nothing short of gross. Toy Soldier is frankly amazing. Lunatic High, of course, didn't hurt either.
One-Winged Angel Sephiroth
Something a bit different here.
L75 Cait Sith (Curaja R5/Mana's Paean R4 - Dr. Mog's Teachings)
L80 Red XIII (Mental Breakdown R4/Full Break R3 - Mako Might)
L80 Aerith (Alexander R5/Valefor R5 - Devotion)
L80 Yuffie (Phantasm R4/Steal Power R3 - Selfless Summoner)
L80 Vincent (Memento Mori R3/Dark Zone R3 - Vow of Vengeance)
Selphie Dreamstage RW (I was afraid of his Meteors at low HP. As it turns out, he never casted it once)
Yeah, I decided to forgo Dispel because Sephiroth's Scintilla counters would become irrelevant regarding Haste in his low HP phase anyway and I suspected the extra offense from Mana's Paean would be more useful. In hindsight, I should've given Cait Sith just Faith for casting on Aerith - would make timing Memento Mori unnecessary and Yuffie honestly didn't gain much from Mana's Paean. Heck, I'm thinking I should've handed Yuffie Dismissal instead, since Steal Power would let her work it off offensively just fine. Still, Steal Power is good against Sephy. Mental Breakdown was a good choice - lowering his RES, along with Mana's Paean, got Aerith to break 11k damage per summon cast, while Vincent dropped 18k Dark Zones all day. Late in the fight, things got hectic with a few unfortunate Scintilla counters - he actually ganked Yuffie. Pulse of Life to the rescue, though, and the buff loss when you're running most of your mitigation as breakdowns isn't anywhere near as bad. Cait Sith and Red were ultimately my team's cornerstones, while Aerith and Vincent provided the necessary offense to end the fight. Pretty tense, but ultimately manageable. The extra AoE healing from Dreamstage was pretty nice to have as well.