I just wanted to say that the Midnight blade strategy for level 80 involving:
*x *x *x
MB - Gai - Kankuro
*x *x Hinata

Really does work, though I wasn't able to pull it off until about 17.2k power. Also, I had the best luck and eventually won after putting Hinata in the top row rather than the bottom. It ended with a finale of basic attacks between MB and Sasuke as final survivors but I pulled off the win.