Forcing Forehand : swing the disc from open side to the breakside
when (blue 2) around backhand to (blue1). in the meantime (blue 3) should go to the breakside.
(blue 2) should never (well not the best idea) to cut upline to the breakside. Reason : you are running into ur mark (red 2). second : (blue 1) has a mark forcing forehand, so it is hard to throw a backhand.
(blue 2 ran away from the dump position.) you need (blue 3) to fill in the dump. this is not the best idea. Reason : (red 3) is on your openside, filling to the dump position is like foot racing ur mark, which is not the greatest option.