I use Luminara (L), Jedi Counselor, Barris Offee, Royal Guard, and Geonosean Soldier or QGJ. I use them until I get to a node that sucks and send in a less than great droid squad to waste a few Specials. Then tray again with my main. Back out if not going to happen then send in the Rebels to tear up a little. Try again with my Main.
Basically, I just send in teams with synergy to break them down. That said Since they updated GW I run into the hacksaw on nodes 6, 10, and 12 so by the time I get to node 11 i may be tapped out.
3 healers, a tank, and a dps seem to help me gain the most resources from Galactic War