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I find the Tizetrio solution to be very convincing! I myself was a contender for the "Golden Lion" award when I was looking for clues by working backward – based on interesting details from the characters' biographies... But I haven't studied the "golden eggs" much. The clue is quite solid, so Sir Erseyd should be punished!
Besides, it's strange that nothing in the first solution bothered you.
Added 3 minutes later
Sir Erseyd, I thought you yourself believed that there were 2 clues on the first night, one of which was planted by the mafia.
it can be slightly extended