What? That dominion spawns the troops? I thought that is obvious, the reason why I mention forts is they protect your temples from attacks, temples out in the open are rather easy targets. More territories means more events and a minor increase in gem income. I also know that unholy knights only spawn at forts, which are a big threat. Regardless, you should have noticed during the sieges I've done, I've tried to remove your domain from your forts, which now I'll admit has been my goal, to remove your domain to reduce your troop generation. I'm also aware you have eluded that I should be taking all your territory before attacking the forts, but that doesn't work with ulm, all melee troops are map move 1, if I had moved up to take those two territories by the cave you would have marched an army into my territory and started pillaging.
Also, regarding c'tis, I've mentioned it before, I don't know much about them besides they have a disease spreading dominion that only affects non-sacreds, but I could also be wrong about that. Oceania...could pose a problem, but besides being a thorn, not much a threat in my opinion.
Anyways, the thing with bane venom charms, you can throw them into a lab then take them out anywhere a fort is about to be attacked. Oh, and if you think ermor is bad regarding micromanagement, try juggling 10 dwarven hammers that I am using in this game and outfitting almost every single commander with items.