Rolled a Prot Warrior and gave him the 5-piece looms plus the sword. From 10-12, I didn't have a shield. Mobs couldn't hit me, but rage gen was so slow in Defensive stance that I could do nothing but stand there and auto-attack. It was painful. Ran back to Org and bought a shield, and just like that, I had access to Shield Slam and was two-shotting rares. Utterly stupid and fun.
While I was grinding the JP for those looms in heroics on my Druid tank, I got one particular random heroic with a stupidly well-geared Resto Druid. It was Scarlet Monastery. On Thalnos, he blew Heart of the Wild and did 122K DPS. I did 60K. The three DPS did about 45K put together. At the end of the dungeon, I looked at the overall damage done and the Druid was #2 at around 37K average for the whole dungeon. I've never seen anything like that.
In general, on any kind of AOE pull, I've found that Guardian Druid is completely bonkers. Thrash dots tick crazy hard. It takes a tremendous amount of focused damage to pull anything off of a Druid tank, and I routinely top the charts on huge trash pulls like the ones in Heart of Fear.