You'll often find two powers in City of Heroes to be mutually exclusive such that turning one of them on will turn the other off. My favorite example of this is Super Jump and Combat Jumping in the Jumping travel power set. Since Combat Jumping is a useful defensive power, my characters that use jumping to travel pretty much always have one or the other active at all times. As useful as they are, however, it is a pain to have both of them in your action bar at the same time. You only have ten assignable "hotkeys" active at...