I've been doing pretty well with Y-Wings lately. R7-T1 and the generic R2s are my preferred Astromechs, and the Ion Cannons are excellent board control. If you can Ion a target while it's stressed, it's pretty well SOL.
Been practicing this list:
Grey Squadron Pilot + R2 Astromech + Ion Cannon Turret
Grey Squadron Pilot + R2 Astromech + Ion Cannon Turret
Gold Squadron Pilot + R2 Astromech + Ion Cannon Turret
Gold Squadron Pilot + R2 Astromech + Ion Cannon Turret
I love this list and my friends hate it when i use it.