I'm not an expert on this matter yet, but a good start would be:
Hp% > Max Resistance > Meter Gain > SM CDR
As for the moveset,
Strike Up the Band, Tympani Drive, Super-Sonic Jazz, Beat Extend, and Burst (for the Guest Star, pick either one of the 2 level 3s, the unblockable ones, or the Minette Chomp (I don't know the name))
should do just fine. I was thinking about switching Tympani Drive with Giant Step, because of the buff-removal, but rather than buffs, players would probably inflict debuffs more.