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No, Lynx cannot be a town role at all.
My approximate lineup: Lynx-Yashur-Master-Sky. Lynx 100%, Yashur ~70, Master 50, Sky either as a father role or replaced by any of the weaker roles.
I still don't consider Fragment as a mafia role. Either it's a multi-move mafia strategy for the entire game to create confusion, in which case I'll applaud.
Whether it's a board game or not, it will be easy to determine if Nephalem uses their ultimate ability today.