It would be a big mistake to try and put it on a switch or as a mix. You crab by giving rudder and enough ailerons to keep the wings level. The amount is fully dependent on speed and any cross-wind. It's not a fixed throw.
Some models need (or can support) 1/2 rudder and others may only need a few degrees. Depends on rudder and aileron authority and the wing shape. The Acro Wot looks to be a pretty hot model and maybe 1/8th rudder would do.
But as others have said it's not the answer for slowing.
Rather than cutting the motor go to a low power. The prop spinning slow causes some braking effect (more than just stopped or idling, surprisingly). Come in low at 1/4 throttle 100 ft out and fly to a few feet over the ground and then gradually drop speed and increase elevator to keep the nose up.