If it is LYLO then Guak/Ghug are the first people who come to mind. The way they went about attacking one another last phase is very, very similar to the way Ghug and I won M9, with one of us bussing the other (I was trying to get Ghug lynched) and the other trying to get a random townie lynched, so we had the possibility of winning on that day if they lynched the townie, but if they went the other way and lynched Ghug I'd likely be exonerated and win the following day instead.
Guak constantly pushing on Ghug, with Ghug pushing the Jamiet wagon yesterday, seems very similar to our old strategy. Now Ghug is pushing Guak and Guak hasn't voted yet. Maybe they wanted to swap over to further dissociate? Or maybe they decided they wanted to bus one another 100% today to make sure the other is townread?
I have no idea who the third person would be in this group. I need to look back at D3 opener - if Amne did join mafia, it happened N2. There's no other time when it would be in their interest to do so.
If it's not LYLO, then it's definitely not Ghug/Guak. As I said, if Amne didn't join scum, then mafia can't afford to bus one another for fear of Amne-Bomb being present, in which case they insta-lose by doing so.