Setup
1 should attack the hips of their defender prior to making a choice on their dump cut. The cut is chosen based off what the defender will be worse at covering.
If the defender is ready to cover a slash across the front of the stack, then the dump should double back and receive a swing.
If the throw doesn't come
Because the defender has followed the double back well
Then 1 should clear up the break side to allow for 3 to provide a reset
Now return to a stack.
Reset
Option 2 is where the defender is very on top of you and will well cover the double back. In that case the dump should slash receiving the disc up field.
If the throw doesn't come
Because the defender has covered that option
1 should clear up the break side, allowing for 3 to reset.
Now return to a stack.