So how's the daedric invasion supposed to work?
I tried playing as the Meridia-following aylied dude in Valenwood, and planned to make the invasion. It took a long time to get enough ardor, so in the mean time I got an empire title and control of 6 de jure kingdoms. Then finally, when I can get the invasion, I am granted the title "great army of meridia" and a 45K stack, but I get forced convert to Clavicus Vile, and a bunch of oblivion gate spawn dudes declare war on me.
My guess is that it's something to do with the scopes. The "governor" character must have changed religion. Why, I have no idea, but there it is. Offmap power scopes are a bit on the complicated side (this is why some of the localization for offmaps isn't complete). Definitely isn't the intended behavior, but it can be fixed.