If you do extreme or savage, you lose all your sprout points. All 8 players need to perform well and as a team and yes that applies to ALL of those no matter how old as long as you do them synced.

Ramuh is a grand challenge and after around 200 ish mentor roulettes in that very duty i have not cleared it in a random group.

But why do i write this? Its a "default" problem. All players are expected to watch a guide before these fights, but for the old ones ... new players are not aware of the difficulty spike or just want to do it blind.