Just before i switched to a fury dps build, in tank gear, fully raid buffed, i was hitting 21K health.
The key i found is getting every gem slot you have filled with solid star or elunes, (if you can afford it, and there is a black temple guild selling them) get the epic +15 stam gems.
after that, get two very high stam trinkets. off the top of my head a few that are easily obtainable are:
Commanders badge, (reward from the netherwing exalted status)
Goblin rocket Launcher (if your an engineer, )
or
any of the new Darkmoon Fare Cards (they will cost a few hundred gold, but very worth it) i think they are +51 stam... (i personally use the one that deals holy damage)get two, if you can afford it.
There is a new trinket from magesters terrace thats like +54 or 55 stam, which is crazy
and use the reagents that Froman listed.