It's not a persona, it is meta-mafia bullshit. A persona is how you talk about the game, how you act with others in the game. What you are doing is meta-mafia where you talk about things as if people only care about who a player is, not what their role is.
Put it this way, your list would have been the same regardless of ruleset, roles, anything to do with THIS mafia. So it's not a mafia persona, it's irrelevant, insulting and perpetuates a culture of lynching / nightkilling based on previous mafias rather than this one, which is really, really lame.
Ranking players based on your perception of their ability is not ok in an open, fun, gaming environment.
Putting yourself at the top of those lists is egotistical.
Putting new players at the bottom of that list is exclusive, and discourages new people.
THAT is why i got annoyed. You can do whatever you want as a persona and i will almost certainly find it funny, and go along with it, and enjoy it as part of the game, but don't encourage this kind of player based lynching/nightkilling.