set up as is
if discs swings to other side of pitch player 2 marks disc and player 1 goes to middle. allow them to swing but try to prevent them gaining yards doing so. by the middle player poaching any yard gaining swings.
this time player 2 stays marking disc as he is closer. thats pretty much it. As play moves up the field its so important that everyone sprints to get behind the disc. This only works if everyone works their ass off.