[Arryn]

Originally posted by Zen:
The quickest way to preach out a Pretender is to build a Temple (or temples) in adjacent provinces and churn out Priests and send them in to the capital and preach. 4 or 5 of those and he should be dead.

Provided that there are no other provinces with that pretender's dominion, and that the enemy pretender doesn't have such a high dominion that it renders the efforts of the 4-5 priests futile.

But, as you say, if you've been able to surround the enemy capital with temples, by that time the enemy likely only has the one province and 4-5 temple-backed priests should make short work of the false god. In my AAR, I'm still puzzled as to how I was able to get positive dominion in the Pythium capital and still not kill that pretender. A very odd result, based on what I've seen in my other SP games, where I have preached out gods in the past.