Tanking level 70-80 in instances.

[Unstoppable12]

levled my DK as tank from 70-80 in 3 days in lfg system tbh easyest way to level with lfg system an do few quests here there an every where

[Levix]

70-80 isn't too much of a problem, closer you are to Def cap the less the healers will whine though

[Cane]

I have done this, and although it's fast, it gets insanely boring doing Utgarde Keep etc over and over and over. And some pugs just have no clue at all.

[pasj]

When you get to 80 and almost ready to tank heroics i usually get the 3 frost items - they are easy crafts and have LOTS of stamina with +stam gems. Dont worry about the defense cap until raids. Healers have to be really stupid not to heal through any possible crits.

[Agapyr]

Only if you have enough hp to survive the crit!

Tried leveling with the lfg system. After 4 Nexus and 3 Utgarde runs I got so f...ing bored that I even went to Sholazar grinding. Amazingly grinding even gave more xp. Since the release of WotLK my Prot went from 70 to 74! Maybe I should give him a try DPSing.