Why I'm confident Ally is outlasting Benji...
I've been saying this since the beginning, but this episode really locked in for me that Ally is outlasting Benji. We see that Ally is getting visibly annoyed at Benji's lack of effort and realizes that having him as her number 1 ally is gonna be a problem. This, combined with the fact that they introduced Benji as a comic artist, giving a clear way to end his story of self-discovery, leads me to believe that Ally is gonna betray Benji. I doubt it'll be an active betrayal. Probably more like Ally finds out the others are plotting to eliminate him and she doesn't try to stop it.
This feels more likely to me than Ally going before Benji because I can't think of any possible reason for Ally to be targeted. She does well in challenges, and she has no beef with anyone besides sort of Aiden, who's gone now. Meanwhile, Benji has already been targeted before and probably will be again, though I think this will probably happen late premerge. And this would then give Ally an arc about morality for merge.