10 kts too fast isn't that bad. I remember when I first transitioned to the warrior from 172's, I had a hard time slowing down. With 172's I was use to seeing more of the ground, but in the warrior it tends to have a nose up attitude, so you see less of what is below you. I would pitch down too much, which led to excessive airspeed.
Basically what you need to do is bring the power out sooner, and try to keep more of a pitch up attitude. I usually give two turns of up trim when I bring the power back to 1500 RPM. This will increase your sink rate and slow you down. It just takes time to find the power and pitch setting so you can maintain a steady descent right to the threshold.