Hardly helpful advice, as that option is only there for the spire lair. Also, you neglected to mention taking the adrenaline option erases 3 days of your remaining time which could be a big deal for some.
You need 1 morale for him to survive, which means give him riches or one of the prisoners you have. Letting him keep naho when recruited initially counts as well.
Also, I dont know why you are so adamant about using a cheat to change your lair when starting a new game and getting to that point takes around 7-8 minutes if you skip past the text you already read, as opposed to the 5 hours since you first asked, in addition to letting you experiment with different outcomes. You wont be playing this game just once anyway.