Let's see. I'd go with Mei, Iruka, and Fu Yamanaka. That way you get buff from Mei and Iruka for all ninjas. Plus Fu has some benefit to fire ninjas and is good for chaos. or Swap out Fu for any fire or water konoha ninja like, kuronetsu, tenten etc. As for skills or summons, you'll have to figure that out yourself. Sometimes combos just don't work regardless of what summons you have.