I like the build but you may want to take advantage of what Garchomp can do to the metagame. So go with a few different energy and add a couple of energy search. Or in your case you have castaway to get them. Take out one Garchomp level X. That will give you room for a premier ball. You may not want to run three wagers cause if you lose at RPS than that could kill your deck. Go with of all things Professor Birch. Good luck and I am sure you can get better advice than me.