In the days of sulthraze it was a toss up because that weapon just made fights unpredictable with its procs. Rets have the strongest weapon now for 1v1 (runeblade) it's avg is 450-500 hp heal every 5 seconds, so just 20 seconds into a 1v1 and you've gotta burn through close to 2k more hp of the ret. Fight starts going south for some reason you've got shield of vengeance, BoP and bubble still and if you can juke a kick your flash of lights are huge. Warriors are still a powerhouse but they're not unbeatable, both you'll find success in solo Qing.