Is there a list of the promotions that Devouts get on visiting special features? Also, is it correct that Channeling II is removed from priests, and that devouts upgraded to priests can't get level 2 spells of a sphere they got the level 1 spell from thanks to a pilgrimage?
Also, is there any point to building monks straight? It seems to me if you have a requilary and priesthood you should always build Devouts first and upgrade them to monks for 5g, at least that way you get a few of the spells and the pilgrimage promotion.
I don't know about the level 2 spells issue with the Devouts.
But if you go to the Civilopedia entry for Devouts in Magister's Mod, and click on the Pilgrimmage special ability it has a long list of sites in graphical form about a third of the way from the bottom on the left. Just mouse over each entry and it will show you what the spell is.
A couple of comments. Some of those abilities, like the one from Maenalus require you having a religion, Overlords in the Maenalus case. The Guardian of Pristine pass is usually on a hilltop. No problem if it was in your borders when the Devout was produced. But unless they have Kilomorph as a religion and take Mountaineering they can't visit it for a pilgrimmage.
Also, whatever you do, do NOT have the Palus in your borders. Every Devout you make from then on will be insane. Magister seems to love this effect.
I make it a point not to have this feature in my borders when I play the Elohim. If I conquer a city with it in the borders I raze it. Same with a fort. You can eventually remove insanity with Spirit 3, but that is usually a long way off.
Just not worth messing with. I just love moving a stack somewhere and having a couple units decide to run off because they had an attack of "Wahoo."
And yeah, I don't think it is best to make monks from Devouts. Actually any of the units a Devout can upgrade to, should be produced as Devouts. This is pretty much the recon and religious line if my memory serves.
Edit: Wanted to add that if I found Overlords, I never build an asylum. The only time I will is if I have neighboring civs that are close and I will need Saverous to conquer them. Later on a single hero doesn't make that much difference with the size of the stacks you get, and he and Hemah aren't worth the insanity effect (crazed promotion) on normal units.