So, this is how we should setup when the dump is on the breakside.
1 and 2, who should have help from the sideline (v. important!), need to work in tandem. It's almost impossible for a player to take off all options in frisbee, so both players are going to take off one each.
1, the mark, will take behind, making sure he cannot be broken by and throw going by his left-hand side.
2, the dumpmark, needs to not only make sure that the inside break isn't on..
..but more importantly, prevent the danger of being beaten up the line (AT ALL COSTS. Up the lines = scores)
If the handler manages to break 1 and get the throw (it happens). 2 needs to do everything he can to prevent the easy swing.
This can be done by simply sprinting into the throwing lane and making yourself big, before re-establishing the force.