It impossible to have great coverage with great pressure. A good tip is to say your zone blitzing put the guys that are in zone in the best position to make a play. If your doing a man blitz put each guy( either the safety or lb) in front of their assigned man to put them in a better position to defend. So when you get the quick pressure with the nano all men will be covered up whether its zone or man and then you can mix in both and just toy with em'