I'm liking Plan B for the fights.
Oh, right. I think that I ignored it because I didn't consider it feasible enough, but there is no harm to try. Also, by renouncing to those souls, the Shaman may end up being more agreeable.
Let's this be the first plan, then default to others if this doens't work.
Our argument is simple, they attempted crimes in our domain against our interests, so we will judge them. I feel like the Null priest is going to be the most pressing issue, and we can let they kill her, as not even Scales likes her.
So, the order of things to concede on the negotiation:
1) We offer the share of our souls from those we are saving, 10 souls, and the Null priest (as it is not interesting to us).
2) If that doesn't work, we offer the rest of our souls, as a gesture of goodwill.
3) We concede the right to execute Null's family (or at least for it to go to the trial by combat), because we are bringing Scales back.
4) We are fucked, and everything went wrong.
And for judging them, we can let them in jail some time as a symbolic action, to not offend clan Ivy, and then work on building better relations with the mercenaries.
Slight complication: Mason would probably really like his daughter's soul back rather than having it fed to Chieftess Ivy. If we wanted to help him out, we could request to purchase that particular gem now for another soul at a future date.
To be fair, if we get 25% share of the souls, then we may just renounce the ones that come from those 41 we don't want to kill (10 souls). But yeah, +1.
Kidnapping parlaying guests probably sets a bad precedent. I'd rather just negotiate him down to something reasonable; orcs are bad at negotiation, and there are probably things a clan that small could use better than random box artifacts. Like our favor, for example.
Plus, as mentioned nobody's in any actual danger. We can just let Snakeyes, Mason, and 1/3 of Typhoon Swarm chill out in orctown for a bit if we need to.
Inviting them to dinner is a pretty good idea, though. We could bring out our wight as a server and Starling to... be Starling, mostly, in an effort to impress them with our dark magic. And because both of them are probably getting bored hiding in our basement.
Yeah, I think that I forgot to say that we should negotiate first to pay them a couple thousand silver or so instead of the contents of the vault.
So yeah, negotiate first, and have good relations. If that doesn't work, then I default to my plan."Well perhaps I could benefit from being a Chimeric Abomination with a bunch of extra arms... but I'm not sure I want to be that freaky."
We should ask her when she is more mature. Being an abomination will likely separate her from normal social interactions even more than what she already it.
We need a new sacrifice for the cave. Damn it. We really need a better system for this than snooping around the guardhouse every six hours.
We may still get one of the executed as a sacrifice. It depends on how much do we want to bargain to get to plan B
I'm tempted to let word of the cannons spread. Would also fit better with the idea of using them as threats rather than to destroy our beautiful castles. It would, of course, imply to the crown (and any allies we might gain) that we intend to go all the way.
+1, I guess.
EDIT:
We have one more thing for the negotiation: remember the arsonist who burned a shrine to Trance? Well, we can gift him (in shackles) to the shaman.