5, 7 or 10?
Makes a difference which game you're playing to some degree. 5 has a bit more flexibility as long as you know where opposition are. However, generally back corners play their wires most of the time and should be coordinating with either mid-back or mid wires on controlling lanes and fields of fire. For example, opposition making a strong effort up center and have either eliminated or are on verge of pinching one of your front guys. If a back corner is widest gun to be able to suppress that angle or opponent's push its his (or her) job to get on it but at same time see to it that wire remains defended, "Hey Bob, get on the right wire. I'm inside. Jerry's getting pinched. Tell them on the left guns are looking our way."-- as good teams will recognize those opening and jump on them.
Moo