Скачать или смотреть DFFOO - Power's Deepest Chasm: Pitch Lufenia + - Yda LD Heretics Quest

Ace BT+ 3/3, Jack CA
Kain LD, Kurasame CA
Lenna LD, Exdeath CA

Ifrit summon, CoD friend

Pretty straightforward fight, Exdeath CA applies both BRV and HP poison for 4 turns per CA, which basically caps the orb everytime the boss acts.
That gives a lot of freedom with the turns, but if you don't have Exdeath(or Yda, ofc) consider normal BRV poison CAs with at least 8 turns total, the fight isn't that long so should be good.

Lenna is there for debuff evasion(although forgot to 100% and Kain got debuffed the one time he was on the ground) and aura, plus quite good on turn damage; Kain is there to sit in the air and provide off turns damage along with Ace who is still just insanely strong this day.

I used CoD friend because the orb allowed me to, but honestly the drop in aura is massive so I'm not 100% sure it's a good call; if you don't have an Exdeath friend I think you can just skip the friend unit entirely, BT a little later and be absolutely fine.