Skarragian Stance and lots of armor

[Dunkelgeist]

I hope this is the right place to ask this:

Reduction of Damage due to armor is capped (like in skyrim, right?) so an armor rating above 567 doesnt do anything.

BUT if you use the skarragian stance and you have like 20 to 40 % less damage resistance => would it then be useful to get a higher armor rating? Does the extra armor rating offset the penalty due to the stance?