You're a bit of an idiot aren't you? Of course there was a 4th player, they didn't specify the class or spec but it doesn't really matter. Also, I referred to assassin as the second weakest class, I didn't specifically mention specs. I think we could spend some time debating whether lethality is squishier than deception but this is besides the point anyway.
And yes, it was a sorc healer too.
Just to clear up things, the combat dev just gave a few statistics in a conversation where pt survivability was being discussed so my original post may have been a little bit inaccurate, i'll edit it now.