My setup I get a lot of complaints about... but usually it ends with setup strength 20-20 for town/mafia. Some guy named Azire always trolls/quits whenever I start it up, but when I actually get a group of people to play it (and if the town isn't bloodthirsty) then it's AWESOME and always a close game!
The Setup is basically 9 town, 4 mafia, 2 neutral.

9 town- Mayor, 3 adv random, 2 basic random, 1 total random, investigator, detective
4 mafia- Godfather, 3 adv random
2 neutral - 2 total random

and the vet can't kill night immune people (too overpowered since Vet can be randomed), the arson isn't night immune (too unbalanced if the careful town MUST lynch to kill him), the Cult/Mason are as powerful as possible to make them more fun to play, and anything can be randomed pretty much. Especially when the setup strength at the end is always so similar, I don't understand why some people like Azire hate it so much. It's always a blast trying to figure out what everyone is, instead of getting found out just because it's "unlikely" that with 1 doctor preset that the 3 random slots would have given 2 doctors.

Everyone says "Need fewer mafia!" and "Need SK instead of Mafia" but I don't enjoy having a SK guaranteed. He CAN kill mafia and make it easy on the town, and he can also make the mafia win that much faster because he DOUBLES the potential civilian kills each night! He can be randomed, but a smart town will very frequently win with this setup.