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One way to deal with this zone is to drop a handler directly behind the thrower...
And try to dominate the flat mark.
If the off marks (1,3) pinch in too hard to try and cover the dumps backward...
It makes the wide lanes open for poppers slashing cuts.
If cuts come one right after each other, it will be hard to cover the the open lanes on both sides.
This requires a lot of patience to work through but it can be done. Rushed throws to players that look open but are not is how this zone works best.