Without some way to increase the odds of drawing Tournament + Province together, a purely Tournament-based strategy falls in the same luck-driven category as a pure Treasure Map-based strategy. Where Tournament excels is if you have some way to shift those odds in your favor. Trashing, sifting, and massive card draw are the most common ways, but there are other options (Hunting Party, e.g.), and it looks like Mandarin served that purpose here - sort of "reverse sifting."