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Well, there's a very simple game variant. Let's call it an "easy mode."
In it, Macca is Albea, and Crabby is a purged Dario on the second night. Then, Master is Floria, and for Morning, Arandora, Nefelu, and Ment, I assign the four remaining peaceful roles based on their behavior and psychology. I wrote that list of negatives above based on this theory.
But there are more complex versions – and there are a million of them. For example, Dario could have ended up in Inara's isolation, Macca could have actually been Dario, and Albea simply hasn't revealed herself yet...