Pretty sure this isn't the case with Eversors. Their style of stealth is less "hide from the enemy" and more "kill all witnesses".
Nope, Eversors are literally made as terror weapons, there is nothing subtle about them in the slightest, they detonate when they die just to make a point
Then shoot them. With guns.
Terror tactics wouldn't work all that well on Avernites anyways. Our guys live in constant mortal peril, and the people we've got guarding Lin are top knotch.
This logic doesn't hold up. We had to assign assets do kill the Sorcerer Lords last turn. It wasn't a matter of "hand hold our people and they'll do what we want them to do". If you want assets to fight the Assassins, assign the assets. Our people - also known as Durin - won't assign them for us.
The two situations aren't comparable. Targeting the Sorcerer Lords wasn't something that *had* to be done as part of last turn. It was something the players did proactively. The assassins will be deployed and they'll have to be dealt with. I don't really see why we'd need to say "oh, and someone try to kill the assassins" as part of it - what, do you think our guys are just going to let them waltz right through? Of course not. That would be stupid.