If you can mod this, I'll start worshipping you! (And today I've woke up as an atheist ). But we will have to find 3 sects to every religion. It won't be that difficult, but I'm not sure if every religion does have them (e.g. confucionist sects? I only know legalists as their major doctrine...). About zoroastrism, I'm still very dubious about it. I know they had a lot of influence, but... this faith has almost died. However, I have a simple idea to make zoroastrism, or, as I proposed earlier, a generic solar polytheism, (I still support this idea) become "fading". It simple: make their missionaries, temples and monasteries obsolete with a certain tech (e.g. Theology, or Divine Right). We can make the religion itself to have a low spreading rate, also. That way, ONLY if you built the holy shrine, it will have a chance to continue expanding, and anyway, it won't do it very much.