Well, I beat a three-Takumi team (Takumi x3, Camilla x1). Wonder if I can handle a fourth?
My team isn't max level yet (all my guys are in the low-to-mid 30s) so I'm not getting the very highest scores per battle, but so far I'm up to six consecutive advanced wins.
I haven't really been using stamina potions because I know things will slow down some once I've cleared everything, but the lunatic quests are sometimes so specific that they'll require me to train up new teams, so that's some potential longevity.