The Newbie NewD3 stats thread (upd. 2020-05-20, 51g)

[Not Known 15]

This was one of the possible subsetups in F11 (almost: scum had a roleblocker but it didn't do anything), and the observed 35% town winrate isn't ridiculously out of range, especially as it was in a more scumsided meta than today's.

No. You are making the mistake to confuse a subsetup of a Semi-open with a standalone setup. In a semi-open scum might hunt power roles that do not exist. Standalone? They make the optimal nightkill for dayplay(or what they percieve it to be).
The EV for 7:2 is just 29%, and the results will be probably not in the 40-50% range.

[Not Known 15]

How about:
Tracker 9p(with the improvement of meta this should be balanced. Swingy though, but setups can be swingy.)
Night 1 Cop 9p(Prevents the worst of cop)
Cop/M Multitasking 1-shot Rolecop/M Multitasking 1-shot Roleblocker 9p(can avoid cop more easily but also runs into the risk of 2x cop results)
2x Masons/M Multitasking 1-shot Rolecop/M Multitasking 1-shot Roleblocker 9p(The 1-shot Rolecop is not a strong role vs two masons, but it avoids very bad results)
2x 1-shot Rolecop/M 1-shot Rolecop 9p(This is the odd one; claiming Day 2 is optimal and may split town or not; but claiming strategy is something you should learn, especially for opens)
4-shot Roleblocker/M 1-shot Rolecop 9p(the 4-shot is not trivial, the mafia can just wait until the shots run out, then kill(at the cost of 1 more mislynch though!) if things went badly early.)