As raid leader and MT, I have developed a very aggressive way of making it go smoothly. As long as your DPS is on top of things and waves are dying before the next one spawns, this works very well. We use 3 warrior/druid tanks, and one pally tank. There was a good time period where we did not have a prot pally, so we had a holy pally put on some tanking gear and do the job, but it goes much more smoothly with an actual prot pally.
At the beginning of a wave, I make sure I have Earth Shield and Prayer of Mending. I mount up and go pretty far out of the gates. I mark 4-6 mobs depending on the contents of the wave. On waves where there are 6 abbominations I mark 4 tank targets, and 2 shackle targets. I pick up 2 of them, the other two tanks each pick up one. One of them kites back to Jeana, the other kites the the marksman on the other side to get them all involved in the battle. I also have the Banshees shackled when there are like 4 abbominations and 2 Banshees.
While still mounted, I try and get hit with one or two attacks from the group without getting hit by more (This takes a little bit of work, but I succeed at getting hit by just 1 or 2 times 98% of the time). This gets me some rage, and healing aggro on all the targets as ES and POM count as my healing, and use my stance modifier. Once I have taken these hits I run right to our pally tank on my mount, who is awaiting the wave. If it is a wave with casters, I hit Spell Reflect when they start casting, and I am usually able to spell reflect 90% of the first wave of casts. After this, some of them are sheeped, and the rest I just spell reflect tank from afar. When we started we would have a priest AOE fear these to help out with the damage I take, but it is not really necessary anymore.
The pally tank tanks everything that is not mentioned above, which tends to be a lot of Nerubians and Ghouls. The added DPS from Jeana, and other NPCs which we get involved really helps speed things a long, and so does having a pally tank, because everything can just be AOE'd down.
You do not need to be FR capped, decent FR gear (Still un-crittable), and a totem/aura will be just fine. I don't do the FR tanking, so I can't tell you the exact number our tanks have, but we have had the pally from phase 1 with no FR gear and only an aura do it before. The key to this is making sure that this goes smoothly is keeping this tank's healers far enough away from the boss that they do not get the -healing debuff. You also need ALL of your healers spread out in a 180 arch in front of him, to mitigate the number of them that will take any given cast. Also, with them all in front of him, if the melee gets targeted (Which should all be behind him), no healers will even get the debuff.
Make sure you are keeping a healing debuff up at all times (Wounding Poison, or MS if you are strapped for rogues), and try to have your MT with a lot of avoidance and you will do well here. The high avoidance will not only reduce the chance that the tank gets insta-gibbed while your healers can't heal, but it will also reduce the amount he heals from his aura.