I think one major problem is that there a no macros in-game so IsBoxer setup depends a lot on the classes which are played. My setup for sniper+sniper+merc is very different to powertech + 3 sorcs.
Things that can be generalized are mentioned in these threads:

http://www.dual-boxing.com/threads/4...PS-SWTOR-setup
http://www.dual-boxing.com/threads/4...g-Party-Frames
http://www.dual-boxing.com/threads/4...an-SWTOR-setup