Brave Frontier

I can't seem to kill Maxwell reliably without resorting to dual Maxwell (current: Lario, Maxwell, Elza, Darvanshel, Shida, friend Lario or Elza). What sort of spheres am I supposed to be using? I have Sol Creators/Steeple Rose for most and Amano/Steeple on Maxwell to guarantee 3TKO or try to kill Maxwell stage.

Um you don't need the Amanos actually, just go with legwands and GGC spheres, you need those stats + mitigation to withstand the endless (keep your solcreators if dual sphere).
Since you have a shida it all makes it easier for you, also a Shera makes it faster than Darvanshel.