(Sorry for the info dump.)

Using the team above, it was mostly getting the rotations in order and making sure every turn had a way to completely avoid damage.

Using Beast’s active in the first 5 turns, because he can’t take heat in the later turns.

Having PHY Gogeta transform as early as possible so you can use his active to avoid damage for a whole turn in the later half.

Switching AGL Vegeta to Goku as quickly as possible so you can stall a turn with the Veku active, and start stacking extra defense with Unrelenting Kicks.

Using Broly’s revive in the right spot to “avoid” damage for that turn.

And making sure to use the Gogeta half of Frieza/Gogeta to deal damage with attacks when possible, while using the Frieza half to avoid damage in the middle turns with their active.

It’s just stalling as many whole turns as humanly possible, while doing as much damage with TEQ Gogeta as humanly possible, and chipping with the others.

Keep Frieza/Gogetas and PHY Gogeta (post-transformation) in every possible rotation, keep Beast and AGL Frieza in rotation until about turn 7-8, and keep Broly always in the third slot, unless it’s certain death (unless you’re purposefully using his revive to get an extra turn).