The most useful setup I've found, which enables me to do instances better, is using WASD for moving my main toon, then Q and E are set to broadcast to ALL (including main toon) to TURN left/right, rather than strafing on just the main toon. Then I also have the arrow keys set to broadcast to SLAVES ONLY to to forward / back / strafe left / strafe right.
I should also note that I us ISBoxer to accomplish this.
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Whats interesting, I was going to post asking about this, as I have some issues in some instances on movement.

I use WASD, how do you set Q and E to broadcast too ALL ?so I can do teh same thing to turn left/right ?

And same idea for slaves too broadcast using the arrow keys ?