[Arryn]

Originally posted by deccan:
Note: Abyssia shares a border with me but don't seem to be attacking me. Is the AI smart enough to realize that it should ally with another nation to beat off a more powerful enemy even though there's no diplomacy in the game?

The AIs will preferentially tend to go after the biggest perceived threat, which as you describe is Caelum. The AI (at least for most of the nations) also tends to build temples in every province.

While Angelic Hosts are one of my favorite summons, because they can act as "fire brigades" just like you're using them for, the normal angels of the host are somewhat fragile (especially compared to the archangel leader). You might want to step back for a bit and switch to building SCs capable of taking and holding the provinces you're presently raiding into. Especially if you have death magic and good death gem income, which is excellent for such purposes.