The topic of this thread is misleading, when someone says new player I picture the person running around with a green leaf on them. This person is not new to the game, don't they have to have gone through the story mode dungeons to be able to unlock hard mode? They would have atleast picked up a little bit along the way to see how tanking works. I don't play as a healer but I see what they are doing.
If I was going to start healing and managed to guy my guy up to iLvl 90 I sure wouldn't start on hard mode dungeons to learn how to play it.