Heroic Nex is not Heroic Naxx

I almost never PUG unless I take one of my team solo into a large Raid.
The other day I got whisper asking me if I wanted to tank Heroic Nex ( which I read as Heroic Naxx ) so I ditched my team and joined them.
I was surpised to find a relatively small team of 5 players but I figured the raid was just getting started. I was close to Naxx so I flew up there and waited.
Then I got my summons to to do Nexus... AHHH! ;(

The team make up did look all that great either, I think it was 3 pallys a shaman and a rogue.
I have some 24000 health and other pallys had only 16000 health.
It ends up one of the other pallys was a healer so it wasn't the end of the world that he had low it points.

My pally topped the damange meters :P and we had a few team wipes but overall it went pretty well.