Trust your instincts, jaybeez. This is not the combo you're looking for.
Your opponent utilizes the Talisman exactly once to pick up a single extra Treasure Map that he never uses - almost certainly not worth it, considering that Talisman could have been another TM itself. It looks like your opponent does get a little lucky, lining up TMs when there's only 3 in a 30+ card deck. It's a high-variance, high-reward play, and it worked out here.