Tanking Mitigation (Passives)

[Rassiel]

Or, why is Blocking/Parrying left out of active mitigation statistics for tanking gear? Specifically Blocking/Parry RATE, which is tied to Dexterity. Perhaps I missed the itemization memo, but wouldn't tanking be a lot less stressful on healers (and tanks a like) if our passive mitigation could actually be buffed some without taking a huge hit to our defensive stats?

Discuss~

This is something i've been wondering on for a few weeks, so humor me - i'm just looking for some interesting ideas behind some of the damage mitigation issues tanks have been complaining about.