Salamence is pretty much as "Anti-Donphan" as you can get, but I don't see people playing something as mediocre as Salamence to defeat a deck that isn't even a deck yet. Crystal Shard could be added to the deck along with the Lake Boundary, so that would create a OHKO on Salamence. Don't forget that Stage 2 decks naturally will not play well against Donphan, so no matter how much it metagames it, it will still have a little trouble.