I had fun playing with 4 T70 with Integrated Astromech and R2 unit. Simple, good maneuvrability, fair resiliance, enough firepower. I have yet to try it in a tournament, but i think it could do well. I'll eventually do it, but there is so many thing I want to try and I prefer team that can pull many tricks.
It's a great list for a tourney. Done well with it myself.