Cinque and Freya received synergy boost and Cinque received a major rework that really turned her into a DPS monster
The strat is simple, use Cinque to smash and delay. Use Rem to bring Cinque back. Use Freya as filler.
Timestamp
Party setup at 20:17
Cinque has a 5/5 UW and Freya has a 1/5 UW
If you don't have Raines LDCA use Amidetalion or Quistis
If you don't have Raijin LDCA just use a good party damage boost call
If you don't have Seymour LDCA just use the best Debuffing call you have. Bonus if the call can dispel, a good one to consider would be Paine.
0:00 Before boss hits Force time
Just delay them continuously with Cinque. Get Freya to turn manipulate with Raijin LDCA to keep the bosses from acting.
Land Raijin LDCA before they hit 79%.
6:01 Boss FR Time
Boss will use Bubble Breath+++ but the damage will be negated by Raijin LDCA
At this point nothing changes. Just continue the onslaught. It's okay if they get turns. They'll use Hydroshot+ which is BRV damage only and this buffs themselves with DEF and SPD up.
12:58 After Boss Force Time
Use Seymour LDCA to dispel the buffs they get and to delay them. Then continue onslaught
16:41 Summon Mode
Pop summon before boss hits 100% FR time. Or after... it really doesn't matter too much.
Heal the FR attack with Rem and Freya and finish the bosses.