I did the treasure maps mid-game with this set: Black Market, Bridge, Chapel, Familiar, Farming Village, Lighthouse, Potion, Torturer, Transmute, Treasure Map, and Treasury.
Farming Village+Torturer+Bridge. Bought two maps then trashed them next turn. Opponent resigned 2 turns later. He tried to go Potion+Black Market which was a mistake IMHO. Makes up for the previous game where I lost to a Festival/Torturer engine w/Loan as trasher when my opponent opened Silver/Throne Room ?!?. go figure.