Overall damage reduction is a good thing to look at, but I think what is more important to remember is the need for Expertise in specific fights. A parry can really hurt you with a high damage slow attack. Teron Gorefiend was the big BT example. You could be taking AE damage, on top of large hits, and a hit coming two seconds before it should, when it is hitting you for a large amount of damage, could cause a wipe. Teron was a good fight in many ways, to teach tanks how to gear. Avoidance could save you, but with need to kill him quickly, you had to reach maximum threat, so it was not overly useful because of rage starvation. So, tanks stacked EH to take hits for rage and guard against damage spikes, but a good tank also stacked Expertise to both increase threat and reduce the chance, in this specific fight, of taking a single parry that could wipe the raid.
Last edited by Bayho; 12-12-2008 at 07:26 AM.
Reason: word choice
Loyalty above all, except Honor.