So, CoT:Strath pops, which is always the worst thing ever.
We are at the bronze drake boss with 7 minutes left, with one good DK with Ramaldani's and some other decent gear pulling 4100, my DK as a tank doing 2050, a Mage doing 500k less overall damage than I am and 1800, and a Rogue with the same overall damage as the mage but 1500. Things are going fine; the only deaths have been the mage to the hyperspeed charge from the town hall boss and then the mage again from pulling elites in the gauntlet.
After we start the Bronze Drake boss, the other DK shifts into Frost Presence and taunts off me. I let him almost die and taunt back, and he does it again. End of the fight: "had to you're super squishy".
Now, he is at 28k health in DPS gear in Frost Presence. I'm almost at 30, and am additionally defcapped.
I tell him, "Dude, this has been fine so far, this is the weakest hitting boss in here, and the place could be tanked with 22k health and half the mitigation at launch."
"then why the fuck are you at 26k getting crit for half your health?"
"Have not gotten crit this whole instance"
"lies"
(Flash of Light-only 21k mana Holy Paladin): "dude your hard to heal"
"I'm at 537 defense"
"CAP IS 540"
"That is the raid boss cap; the heroic cap is 535"
"540"
EDIT EDIT EDIT:
http://www.wowarmory.com/character-talents.xml?r=Garona&cn=Shadowblind&gn=LegacyDouble DPS spec, but has broken his 4pc t9 bonus or never gotten it in favor of a 245 badge hat.