Last night, I had a healer doing that, which I much appreciated. Problem is that when they sent the mob flying and put it to sleep, I instantly woke it right back up because I was a MRD and I was using Overpower to hold enmity. I don't know if it would have helped, but they could have saved some magic by not sleeping the mob. She or he did a lot of putting stuff to sleep, but my overpower woke it right back up. In my experience, I think the use of Aura correctly has been about 50/50. I had one healer doing it, and I had the aggro AND I was already beating on the target. I had to chase it across the room and behind a rock.

As a healer, I use it to send a mob to the tank. Hopefully, I don't overshoot or miss. It never crossed my mind to push a mob off and sleep it. Will have to try that.