With three classes, 3 action bars are insufficient. For example, R/W has a modification to shadowstab that allow the bleed without having daggers, so you can equip axes instead, and another elite that gives the same 70% boost to axe damage. THen if you switch to r/s or really anything r//whatever, you have to pull shadowstab out of the action bar, pull up your skills and replace it back into you appropriate slot. When I switch from s/r to s/w, the shadowstab skill is still on the bar. It would make life much simpler and multi-class play much easier if we had action bars for each class COMBO, so a total of 6, that pop up based on the combo you are playing.