With the buff now at 25%, even in full DPS gear I have more HP than I did the first week of hard modes in full tank gear (with no zone buff yet). And since most of the fights are completely boring as a tank, what better to do than try and set TPS records.
First, the spec: http://www.wowhead.com/talent#0ZxGGscrzceoc0uAkbAc0b
Next, the rotation: I like to build up a 5 stack of lacerate first, to let my idol stack up, as opposed to berserking straight away, to give my berserk that extra crit, but mileage may vary. Even if I use it right on the pull, on most bosses I will not get a second one so that really does not matter, and since you probably used KOTJ to get rage for the pull, why not wait and line up berserk with your second enrage. Well anyway after that you can pretty much just macro it and go afk. Assuming a 5 stack is already up, Mangle-> Lacerate-> FF->Mangle->Swipe->Swipe->Mangle->FF->Swipe->Repeat. This is why it is important to cap hit and expertise because you are refreshing that lacerate with under a second to go so if it misses/is parried you need to start your stack all over again. Also MAULMAULMAULMAULMAUL!
After that, the gear: http://www.wowhead.com/profile=21510679 (wowhead does not like my leatherworking for some reason but the bracers have the 102 stam leatherworking lining). Is this the ideal setup, far from it, but it is what I have to use, just to give you guys an idea of the direction to go.
Things to keep in mind, at the 20% buff, I still used my 277 tanking helm (with stam meta) and http://www.wowhead.com/item=50682 for the extra armor boost. I also had my tanking belt with 2x30 stam gems and a 51 stam gem until the 25% buff.
The most important thing to do is cap hit and expertise before anything else, although what the parry cap actually is is anywhere between 54-60 depending on who you ask (I think 14% or 56 is the right number but don't quote me). The three pieces I love for this are the trinket, the cape, and the chest. All very easy to obtain (10 man HM trial, 10 man Morrowgar, 25 Gunship) which combined give 5% hit and 30 expertise skill (40 on the character sheet because of talents).
The other important thing is still use 4pc t10. With KotJ, you will be using enrage a lot. If you do not have the bonus, the armor loss from using enrage, combined with already reduced stam and armor from the dps gear, will be very deadly.
Lastly, Fights I use this on (all heroic mode):
- LDW (swap the bracers for the identical ones just with a 70 frost resist fur lining, and change the runestone to Sind's flawless fang)
- Festergut (this may surprise people, and you may think this is because I am the first tank, but I am not. Surviving the 3 stack is about using cooldowns nothing more)