I know gomah and Broly are good for the mission but im lost on the other 4
#Need help with extreme class Festival of Battles mission
stoic thicket
Well your Super part of the box is missing
Please post both the super and extreme part of your box
the team doesnt need to be full extreme
gilded veldt
the team doesnt need to be full extreme
apologies
stoic thicket
Gogeta (lead and friend) - 
Wrathly - Gomah - 
GoFrieza - Vegito - 
SSJ4s
For the 7Ys (SSGs and SSJ4s):
Keep them on rotation at all times (preferable seperate rotations).
You need to gauge how much Ki you give them every turn as they can deal too much damage if you give them too much Ki, but you also dont want to give them too little so they dont do additional SAs (read their passive)
Ideally transform them during the Daima phase, earlier if you need the damage.
For Gogeta / Vegito:
Their base stacks ATK
Their exchanged form stacks DEF
You want to stack DEF to around 2,5m and then stack ATK.
That makes them tank basically all normals in the stage and in the later phases (starting from Fat Buu) you can SA scout by transforming them.
Transform them during the last two phases.
For Wrathly:
He can deal WAY too much damage early on, so ideally let him get his buildup from getting hit and then float him until like phase 25 or so.
Use his active sometime in the last three phases.
For Gomah:
He can deal WAY too much damage early on, so ideally float him until like phase 25 or so.
You dont use his active at all.
For SSJ3 Goku:
He doesnt need too much stacking, so floating him most of the time is fine, but depending on the situation you might want to put him on rotation for a bit.
Transform him in Turn 5, he doesnt stack before transformation.
For INT LR GoFrieza:
Exchange them to Goku asap and just float them.
Make sure they get a RBW orb