As far as I know, there's no minimum experience requirement for suggesting open set-ups...
One Prostitute (can both roleblock and kill in a night)
One Vigilante (town aligned, can make one kill per night to aid the town, unlimited shots)
Three Vanilla Townies
Day Start.
The idea here is that in a similar setup with all vanillas, the town has an approximately 46.7% chance to win if there is one lynch and one night kill each day and night. In the case of a day-one no lynch, the odds go down to 25%. With day-one and day-two no lynches, the odds go up to about 33% percent. None of these figures can take into account scum-hunting, but I'm reading this as a roughly balanced, slightly anti-town game. The theory behind
5PNV
is that with a vig and prostitute, it should be both more balanced and more interesting. (YMMV on whether a game with only one mislynch allowed and a maximum length of three days is interesting).
The obvious flaws to me are the fact that the game can end on day one, and that if a trigger-happy vigilante decides that its his god-given right to 'win' the game for the town, things get messy (I had this happen when I tried to run the game with a few of my friends). One particular quirk of gameplay as that VTs are the only players with an incentive to claim vig, making claiming (fake or otherwise) difficult, if possible at all.
This game is also runnable with six players (one extra VT) and a night start, however, I'm not a big fan of night starts.