There is no team that destroys everything. A varied roster is required to complete the hardest content in this game.Is it time for me to start carrying a debuffer? Currently Garnet, Beatrix, Cait Sith destroys anything ...
...except the fight that matters, the Event EX.
Garnet, Beatrix, Cait Sith is not unique in being able to destroy anything that isn't the hardest content. I can complete literally everything that isn't hard content with Setzer, Yuri, Garnet AOE shenanigans.
The current EX required me to use Rem. The EX before that, Eiko, and Vanille.
I think it's great that strategies require variety, I just wish that variety was a little more expanded.