Tapu koko for lightning type because it has free retreat and if you decide to spread and take a bunch of kos at once with the gx attack. Maybee white kyurem as a secondary attacker and against one prize decks, or maybee either water type volcanion as they can both spread good damage for 3 arceusable energy. You would obviously run wishful batons. Any water type with free retreat could work. Maybee tapu koko prism for electric. For fire you could have magcargo for draw support, maybee even pair it with swampert as your water type. Another fire option is alolan marowak for some extra acceleration. Maybee even magcargo gx for acceleration.