I am doing a dualboxing set up with warrior + priest. My thought is to use bongos on them so I can have a full bar for each, and just change the priest to Shift1 to Shift= and leave warrior as 1 to =. I just think this would be a lot better so each class can use a more variety of its skills, definetly useful in the later lvls when you get useful skills you can use because of action bar clutter.