I don't like 3W in the backfield ANYTIME. Why guard the sideline? You know where the opponent wants to go. Cover the goal. Against a strong AMC/ST combo, I'd go 3N-1(DMC). If you commit too many to the back, you may keep ANYONE from scoring including yourself.
I'm just a newb, but I'd try 3N-1-4-1-1. You might win the possession battle with 6 midfielders to his 5, keeping the ball away from the dangerous striker as much as possible.