Machina Blitz is back once again. The stage requires you to kill the boss before both minions go down otherwise it will resummon both minions as well as cleanse all debuffs AND dispel your buffs. This is perfect for Machina since his BT damage is very single target focused.
Timestamp
Party setup at 6:55.
I removed BRV initiative passive from Garnet to make her a bit slower.
If you don't have Seymour LDCA, just give Selphie a call that can inflict at least 3 debuffs to the enemy party. Tidus, Caius, Faris are good examples.
If you don't have Raines LDCA, the only other option is Onion Knight LDCA for the turn warp.
If you don't have Leo LDCA, try Prishe, Alisaie or Cait Sith LDCA
0:00 Setting up
Reset until you get a turn order of Selphie, Machina and Garnet.
Selphie uses Seymour LDCA then LD
Machina uses LD, then Leo LDCA then BT+
Garnet uses Peridot Thunderflash, then Raines LDCA on Selphie, then BT+
Swap Selphie for Ramza and use BT+
You'll come to Machina's turn again, I used two Awakenings but I think you probably won't need to.
3:15 Machina BT Mode
Machina go brRrRrRR on boss. Boss dead. Before it does it will cleanse 3 debuffs and grant a range of buffs. That's where the Seymour LDCA came in at the start, it provided Debuff fodders so that the more important ones remain.
It's okay if boss survives the BT mode because you have Summon Mode coming up :)
5:15 Finishing Up
Just pop Diabolos Summon after BT mode, it will dispel all enemy buffs, making it easier to mop up.