This may sound like a dumb question, but does the AC rise higher or go slower at different difficulty levels? I play on either Immortal or Emperor and I to find it hard to get the counter past 20, even when 4-6 civs on a small Highlands map converted to the Veil.
I don't know. I play on the same difficulty levels and the counter almost always reach 40. I play on standard maps, so that might be why. On normal speed.
In my latest Immortal Loss, os-gabella founded Veil, built Rosier the Fallen. The Prophecy of Ragnarok, and brought the AC to 40 before turn 170, after which she quickly declared war and took me out.

but instead it's more like me as the Bannor living in uneasy peace with the good/neutral versions of Jonas Endain or Alexis. 

