On phone, bear with me.
Sach may be scum posing as a cultist. If we lynch crys and she flips cultist, we still don’t know about Sach.
If we Lynch Sach and he flips cultist, we confirm crys because cultist Sach wouldn’t have revealed off of an invented role claim.
If crys flips scum, then sach is also scum because it means he’s claiming off of a faked role claim.
The only way this breaks down is if cultists are real AND scum was for some reason given their PMs.