Brick/center set up. Tight mark up front. One should not poach if possible. Rats can switch marks if communicated and when appropriate.
Rats need to take handlers out of the game until they cross the "short deep" line. This means they must prevent their player getting the disc until they are no longer a threat. Handler 1 up the line would be a dangerous play to stop.
Rat 1 leaves handler 1 when Short deep can take over. and need to get back into action up front. Take the next active handler that is free/ comes back to handler. If there is none, look to create problems for the disc to flow. Right now there is a lot of space in the offence side (where FM could be useful here to prevent easy pass - in one scenario)
Rat 1 is pushing to the open space/ see's 6 as a danger option.
The 4 back want to shut down dangerous spaces and players and need to work on what is best to give and what is best to leave. In this case SD-mid2 might want to take away any pass into the middle vs mark out 7. SD-Mid 1 wants to make sure an in cut from 5 is taken away .
Another example of front back interaction step 1
step 2.