What is more important?

Parry rating or dodge rating on a Blood tanking DK?
Correct me if I'm wrong, but...

Dodge: mitigates 100% incoming melee damage.
Parry: mitigates 100% incoming melee damage and sets auto-attack timer to zero.
Mastery, is more important than both.
Parries reduce your current swing timer by 40% (bosses with parry haste enabled do the same when they parry you). From what I've heard, parry and dodge have similar DRs now, so you would ideally want them to be balanced to get the maximum avoidance.

Mastery is far superior to either, though.