In the traffic pattern, along with landing checklist ... set prop to high rpm. This will increase drag, giving a steeper approach angle,
It is not a wise idea to use the propeller as a brake on the Rotax. If possible, avoid driving the Rotax by the propeller. Rotax drives back the oil from the crankcase to the reservoir by blow by gasses. Blow by only happens if the average pressure inside the combustion chamber is higher than in the crankcase, hence the engine drives the propeller. Driving a Rotax by the propeller will increase the oil level in the crankcase, cause the crankshaft to touch the oil, creating air bubbles in the oil. Air bubbles in the oil will kill the hydraulic valve lifters (at least in the long term).
It is fine to set the CSU to max RPM once you have reduced speed in the pattern, but leave it at cruise RPM during decend and deceleration.