Yea when I ran it normally on my rogues and warr I got slept every time on both chars...in the former case that's good, the tank kept him aggro'd; in the latter case it wasn't so bad as we had a pala present ready and able to take the aggro; the above suggestion of putting a mage up his butt to take the sleep is yer best bet; scoot the tank out to max tanking range and blink the mage in under him asap