Our usual tanking tactic uses 1 paladin (me), 1 warrior, 1 druid.
We MD the boss to the warrior, he starts. He builds aggro for like 10 seconds, then only autoattacks. If the druid gets aggro, he stops doing anything. If i get aggro, i use only Holy Shield (rank 1 if i have big threat lead) and just autoattack.
We tell the DPS to not do anything in the first P1 so we have some threat lead for the rest of the fight. If a tank gets > 8 debuff and other 2 tanks cant pick the boss, we bubble him.
The plan for us is not allowing the boss to refresh stacks on a tank. If i lose aggro, i build soft aggro and stay behind the other 2 tanks until stacks wear off, then i start again. I use spelldam trinket or avenging wrath for that, i guess warriors can abuse of the Autoblocker for same purpose.
Just pray that rogues or tanks get fel rage. I hope u arent as unlucky as us where it only hits holy priests and mages
Also another suggestion: if you dare, have a disc/holy priest spec full disci: pain suppression is pure gold while learning this fight.
Worlde - Prot Paladin
Darkworldie - Tank DW Frost DK
Uord - Prot Warrior
Huordie - Feral / Resto Druid