I'm not sure if they're gonna honor the way it really used to be in 2005 Wow, but:
I used to be able to pull the entire Cathedral on my shaman. The secret was Stoneskin totem which, at 60, would reduce incoming damage by like 50 per hit, so literally everyone in SM would hit you for 1 damage. Even that terrible Healing Stream totem was stronger than the incoming damage.

Of course there was a downside:
1) Good luck ever getting a cast of Chain Lightning off with 50 things hitting you
2) Fire Nova totem would get instant aggro and so would magma totem.

So the trick was to do Stoneclaw for just a second while you got Magma totem out, and once everyone was damaged by a pulse or two of that (and they would kill it) the aggro would transfer to you and you could start cooking them down with more and more magma totems. Fire Nova was a coinflip, though.