He began to step back the moment the Moody's wand was out of his reach, but couldn't avoid the fist aimed squarely for his jaw. Rosier kept his wand ready, though the force of the hit was strong enough to make him stumble back another step. He hadn't had a thrill like that with the monsters except for the first encounter at the castle.
Evan didn't wait to see what else Moody had in store for him. He cast a strong cutting curse and just escaped the attempt to disarm him with a large sidestep. Typical Auror tricks. Rosier cast a second similar curse, a severing one he was fond of, aimed for the wooden leg, and continued to move, though did not bother making distance between them. One of his secrets to duelling was often staying mobile while others stiffly waited for their deaths.
He had to see his face when he killed him.
[OOC: Sure! A some duelling before injury works for me! Sorry about the roughness. It's been awhile since I played out a duel of any kind. Let me know if I do something horrible wrong. Maybe Rosier is ready to kill or begin 'taking apart' Moody and then the monsters come out of nowhere to unexpectedly save the day for Alastor?]