And actually, if you think about it.
Having Sheriff and confirmed citizen and 2 masons
Would make it more likely to have a solo scum. As it gives them a chance to blend in better.
Her claiming Solo mason lends itself to you believing solo mason would be more probable because of the number of confirmable roles would ruin game if it was 2 scum.
1 scum in an 8 player set up with a 1 lynch threshold lends itself to finding a needle in a haystack.