My guess as to mafia.
Jigsaw (John Kramer)
Amanda
Detective Hoffman (I can see this as a role cop)
Lawerence (First jigsaw victim guy who cut his own foot off in first)
Fakes Likely:
Jill Tuck
Xaiver
Art
Zep
Logan
Cecil
Unless of course Jigsaw can recruit which case that could be anyone and instead we got Kramer/Jigsaw
With Pigheads then and they just wear a mask.
I can see being 3 or 4 as mafia and likely a indy in there as well except bunch of detectives from the movies in two except hoffman who ended up being jigsaw apprentice.