Okay, so I'm usually an analytical player. I watch other people for scumtells such as excessive RVS, OMGUS, and keeping an eye on the nightkill, as well as the probability of them being scum based on the tells and how productive they've been. Also, try to figure out the motives on stuff.
However
I usually play in real life, so I have a tendency of lurking until I'm fairly certain of who's scum. This of course, doesn't work on Mafiascum. So, I'm trying to not apply all that I use irl since it can be a bit awkward. Normally, I wouldn't make such a hot mess such as 90 because I had my argument together and it's way easier to just raise your hand than to try to explain logic that got closed the first time.
So yes, usually that analysis playstyle works for me, but my online play is poorer than irl and I need to work on that.