^ Well I've actually never seen a single Garchomp in a tournament, just a bunch of red face paint decks, Mario, Blissey, and a couple Electivere. That will be taken into consideration if that guy becomes more popular. Mainly Mario and Blissey are my threats and there really isn't any great tool to stop them, but lake boundary is nice to lay down the hurting for the Machamps. I was also considering playing a single Stadium plus a Scott engine, but the best part about Castaway that is the most helpful to me is the energy that it provides. I can't even say how useful that feature is.
I guess I'll just add one strenght charm since there aren't a whole lot of choices for tools. So it sounds like the answer to my question was that Castaway works best with at least one tool. Decks without PokemonPowers should definitely play 3 Cessation Crystal as long as they play Castaways.