Dirty_Player
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In my opinion, it's difficult to create a non-mirrored L-sized map template that would be balanced. Therefore, no matter which one you choose, the result will be the same. You could take Black-n-Blue, for example.
Mini-Nosta is a template based on the principle of "neither for you, nor for me." This explains its "popularity" (frequent choice) in tournaments. And it will always be this way when players who prefer different templates meet.