Not sure how much of the current live formula was in place back then, but it was posted by Dev Dzarn to the forums a few years back for the number crunchers.
Dev starts in about halfway down the post and shows a bunch of the formulas.
Here's the link.
https://forums.station.sony.com/eq/i...s-acv2.210028/
Okay, this is something I've been researching over the last few days to present.
What is your 'Real AC'?
Or, When 'Mitigation AC' meets 'Avoidance AC'
Hopefully this will shed some light on the arcane calculations used to get the number you see in your inventory window versus the number used for some mitigation and avoidance purposes.
I'll preface this by saying that this may generate more questions than I am able to answer in the near future, but this is as complete of an answer as I can offer at the moment.
So you want to know what your 'Real AC' is? I'll step you through the calculations and explain why the number you see in your inventory window is not representative of what NPCs look at when they're hitting you in melee combat. It is a strong possibility that sometime in the future the number you see in your inventory window will be accurately reflective of the number we're going to calculate here, but this will hopefully be helpful in the meantime....
Just posting as an fyi, not sure if any of it relates to classic