[PvK]

Well as I think I said, yes you can try to go 100% blood summons.

I don't think I would, though. Mictlan Priests are 80 gold and sacred, so very cheap. In my Mictlan game, I have almost never had to choose between hiring a priest, and hiring any troops. The troops are cheap.

Yes one has to be careful about combining devils with units that aren't immune to heat. I lost my unique mummy death mage that way (heh). However if I started them out in different areas so they aren't dying during a Hold stage, I didn't see many Eagle Warriors catching fire during battles combined with devils - maybe one or two per battle, and the fire generally went out.

At any rate, Eagle Warriors can make a big difference in the early stages, when you don't have devils but Fiends of Darkness, who have no heat aura anyway, and so it's better both for the Fiends and the Eagles to combine them in a different army besides a devil one. Having enough numbers is important to the success of fliers, and so Eagle Warriors can make the difference for a Fiend force that is just building up enough strength to rout an enemy without getting beat up.

PvK