Archer %/s (KMS Unlimited and GMS Tempest)

Might it be you're missing some defense ignore in your calculations?

I do not know if GMS has this but EMS tells you how much ignore def you have:

Armor Break grants a 50% extra according to @Aggravate :

The latter, so as an additional 50% PDR source, you'll go from 80% to 90% multiplicative PDR.

If you mean anything else, please tell me