My guess would be that remaining roles are: Doctor, Watcher, Roleblocker, and maybe a Hider? The scum should at this point be almost certain on who the doc is. The con of Samus/Yehom focusing on intercepting scum is that they may hit the doctor.
Now, if the scum are indeed among the remaining four, it's easy game now, as we can just lynch them one by one in any order we like (we can miss 2 times). Problem is, what to do if the scum are not among the unknown 4. Then they can be everywhere, like even the exotic one of Canik can be a werewolf miller and at the same time Jazzy being a Werewolf FBI agent (Unless we know the second Werewolf role this scenario is possible). Still, trying to backtrack to the people with the known roles won't be viable...we don't have tools to be honest.
I think we need to focus on the remaining ones until we make more discoveries. I propose we write our types on who might be the remaining 2 scum to create some pressure and let Samus know what are our thoughts. He shouldn't vote so that the scum won't know who will he target (I know this way he'll be probably blocked, but at least we'll have a discussion and a preparation for the next day).
We need everyone to share their thoughts on the remaining four and who the scum is (if you suspect scum is outside of the unknown 4, tell us)
Starting from myself:
Kitkat: Whatever he may say about that, I don't find him helpful. I don't see him prodding or asking questions, just commenting on the situation with one-liners. He's active but his activity is not bearing any fruits. Hasn't told us who the scum might be.
Lachiton: Not very active, but has more thoughts to share than Kitkat. Yet the most dominant thought he shares is "remember, all those peopled that RCed are not confirmed". While it's true, it feels like he's trying to distract town. Especially since he does not try to push into any direction. Hasn't told us who the scum might be, even though he promised such analysis few days ago.
Lord Sunday: I have nothing against him, except that he's to silent. When he shows up he adds value to the conversation.
SM: Can't say anything about her, as she just reports current situation: "People that RCed seems townish (except for Samus) and the rest gives her no reads". Surely, she might be town trying to help, but it's not really working.
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Assuming there are 2 scum among them, I don't think it will be Kitkat - Lachiton team (it sometimes feels as if they share the same thoughts and I guess scum would try to create some distance). My guess would be one of them and then SM or LS.