Demon invasion.

I finally managed to beat it! Orange kept trying to reach me, but I ran between Castles, and as soon as he came through the teleporters, I would quickly turn around and run to another Castle, gather reinforcements and caravans, and repeat. I cleared almost all the best artifacts, and with 18 points in Sorcery, I was dealing 40 damage to his Temptresses with a single chain spell. After a few weeks of these maneuvers, I was in a good position, and he didn't risk coming near me anymore. I took the third Castle and defeated him. Screenshot: https://imgur.com/a/P4wik I focused on Attack, Logistics (most important), Machines (clearing without losses with a tent and a ballista), Defense, and Luck. Now I'm starting a war with the Dwarves, and I'm already a little scared.