Parry...

[ZDamned]

Thank you Kitru. =)

If we look at a general concensus of the same exact fight over and over again, you can generalize the amount of average damage taken, and generally, I'm able to notice that I just don't mitigate any noticeable amount of damage with a full on Parry set.

I tended to take between 153-157K Damage each fight.
Between 2 healers, and the time fights last, (5.5-6 Minutes) I just don't think that worst case scenario, 4000 Damage over the course of 6 minutes, (66.7 DtPS) if worth dropping so much more damage and Crit rating.

Mind you though, my lowest damage taken was with Crit Determination gear, and NOT with the max Parry gear.

Also, I understand that it's not perfect testing, however it is true to raid testing. IE: Testing in relevant content.
I will be testing on Turn 6 tonight, however that fight is unfortunately not a good representative, due to tank swapping, along with the way mechanics happen to work out.