I'm almost certain there's a stage 6/Extra. Almost. The ending really really hints at it. It may have something to do with CP or 1cc, don't know for sure. [Apparently you get something by clearing the game as all teams, too]
Anyway. Best combo? I've been playing Marisa & Patchouli, so...
Solo Combo:
Marisa: A, A, UpA, J, A, A, DownUpA, A
Patchy (Charge first two on distance only, no wall): [charge]A, [charge]A, [charge]A, [wait for bounce off wall], DownForwardA
Patchy (Target between you and wall, close): A, A, A, UpForwardA, DownForwardA
Best combo though for M/P seems to be a wallbounce combo... enemy between wall and Patchy...
Patchy: A, A, A, UpForwardA, DownForwardA, Switch
Marisa: Run up, A, A, UpA, J, DownUpA, A, Switch
Patchy: DownForwardA, Switch,
Marisa: Attack +_+
[Note: hard as heck to pull off full combo T.T Also, max length depends on Chapter, as max spells/attacks combo is 2+Chapter Number]
You can also use Patchy's DownForwardA and switch during it to lead into Marisa's basic combo or Marisa's laser, if you can't find a good way to get close to a boss.
So I rushed over to rez my ally
...Say what now?