Enemy armor values classic era

What enemy armor values are you using in Classic era DPS calculations? I’ve heard that different bosses have different armor values. Are you assuming an average? Does this have any impact on the results?

We are using 3731 for enemy armor in classic era. I believe that’s the armor value for a typical “warrior” type enemy. It is a bit lower for a “mage” type enemy.

Most people usually gear/optimize around a warrior type enemy.