[whswhs]

This is the sort of thing where I'd ask for a Leadership roll. Whoever is acting as leader of the fire team can get exact coordination on a success, but not on a failure. You could also apply a Gesture roll, but I think if someone has Leadership skill a separate Gesture roll would be redundant; this is going to be one of the things where a good leader will have made the gestures routine long ago.

Since the intent is to gain effective surprise on the targets, you might also review the surprise rules in the Basic Set.

Bill Stoddard