So I tanked two heroics this morning... Lost City and Throne of the Tides. Lost City wasn't too bad since you can skip a bunch of trash. Throne of the Tides... I really don't like some of the trash in that heroic :\. Our DPS wasn't really very high, so we ended up having quite a bit of trouble on bosses simply because our healer, a fairly seasoned raid healer, was having mana problems. I think the DPS ranged from 4k to 7k on the Facesucker boss.
In contrast, when I did Lost City on my Shaman (as DPS), all DPS were around 10k, which is how it should be

.
I ended up getting an orb on my Pally and crafting the shield. What I'd like to shoot for now is a new trinket and a new tanking weapon. I just wish there was a decent tanking enchant that didn't take Maelstrom Crystals :\.