IMO the best all around team is a Mace lead with Biggs, Geonosian Soldier, Boba, FOTP, and Vader (if you have him, otherwise Tie Pilot) Backups would be Fives, Clone Sergeant, Ahsoka, and Scimitar.
So much target lock to aoe spam with mace, give boba many turns, make his special hit everyone, Make Biggs taunt and regenerate stupid amounts of protection (they buffed how much he gets recently and boy is it noticeable), etc. etc. All the aoe spam lowers the cooldown on Mace's ultimate and has him go more often. All the tm gain makes boba able to use his ultimate more often. So much utility and offense. With all the target lock Mace should really only ever be casting his aoe or his ultimate. FOTP can spam his special on target locked targets. Scimitar giving Biggs counter attack has him target locking people and regenerating protection as they hit him. Biggs and GeoSol are assisting like mad too... It's a stupid fleet.
Best defensive team by far is the full republic fleet starting out, possibly with Biggs in the starting 5, but he's less necessary in rotating tauntville.
Best offensive team? Tarkin with all sith and empire ships, resistance pilot, fives, Geonosian spy's ship for scimitar to target (calls all stealthed allies to assist), and Slave 1.
Tarkin gets massive bonuses for debuffs, This team has a lot of them and as much synergy as you can get with Tarkin. He is nothing but offense.
