2-2 D - 1 DB

Diagram 1: Keeper is in KZ on point. Chaser on point is in help position. Beater w/DB fairly central. unloaded beater with point chaser to prevent easy tap or protecting partner from exchanges.

Diagram 2: Quaffle goes behind the hoops. Defense basically flips with two chasers playing point behind the hoops. If offensive beater is behind the hoops, defensive beater w/DB can be more aggressive. Unloaded beater protecting partner from other beater at KZ line and looking out for rebounds if there's an exchange. 

Diagram 3: Quaffle gets carried or passed to the side of the hoop. Keeper can stay on point. Other defenders move away from their position to guard passing options as needed while being in position to help.