Rao would probably win. If we're going with the Rao taking energy and power from his followers then H'el won't be able to hurt him for some of the battle. He'd kill more people per punch than Superman but I don't know if he'd kill enough to break the control Rao had over the populace.
Originally posted by EcstaticGrace
I don't know much about H'El but Rao probably has better stamina and it will be a bit.. trying to kill him.
Check this out.
http://www.killermovies.com/forums/showthread.php?s=&threadid=602679