Probably someone like Guy, or Han, seeing as they break guard so easily, probably Sasuke Five Kage Summit or Naruto Tailed Beast Bomb, now if you are B-mashing then its different.
Oh and not trying to piss anyone off, but If you do used cheap supports/characters and you KNOW they are cheap, I sincerely hate you
EDIT: Cheapest Teams as follows. Mifune/Hanzo, Pain Balanced, Kimimaru Guard
Oh and also, If you use guard types (The cheapest aspects of the game) then again, I have absolutely no positive feelings for you whatsoever.