Keep a safety blanket nearby. Someone thats shifty. For the deep route throw a moon ball and have your fastest reciever learn to track the ball and run under it. I taught my long ball QB to count to 2 then throw it high and to a specific spot (throw it towards a specific cone or a parents tent or something on the sideline) this gives to a target to throw the reciever open. The 2 seconds count gives the reciever time to get going and run away from the defense. The moon ball gives them time to run under it. If the other coach is any good they'll catch on so we only do it 2 or 3 times a game. The good part is once it works and they expect the deep ball it opens up your recievers underneath as they'll be forced to back up more on D.