I can see a 2-1 LyLo coming down to us, the Messengers, and one of the Vanilla pairs.
I don't think there's a case to be made for keeping any of the other PRs alive over us if there really is a Ninja. The only case would be on playstyle reasons really, I am very talkative and open-minded and you are pretty solvey and determined in the end-game, but then why keep us alive over Confirmed Town in Vere/Apollo or basically Confirmed Town in LP/Coolest and Kyan/Donna when there are always going to be people talking about us as possible Scum now?
If we do kill a Ninja in this game though, the remaining Scum will certainly have a pre-typed NK on us ready to go lol.
I think we should almost always get a Scum flip before LyLo though while targeting in the Vanillas. After that is when I'm open to thinking about SkyChugg more maybe if we can draw some connections there, or if there is any weirdness in connection to them and the "Vanilla" that ends up flipping Scum that we can examine more closely.