You can view all your cards at the same time, so you can get strategic with which Pokmon you want to play. Sean: You need to have a shuffled deck, a table large enough for both players to play their cards, and a hand of six cards (like the number of Pokmon you can have in your party!). Both James and Sean got some elements right, but the correct answer is a little more involved
Ultramarines, Hive Fleet Leviathan, Goff Clan, Black Legion, Sautekh Dynasty, and Saim-Hann
Despite the fact that a graded, PSA 10 rated Blastoise EX card has sold for as much as $1,500, its current average value is much, much lower, at $55
Bartolom del Presidio Yahenni, Undying Partisan was one of the strongest sacrifice commanders, but I think Bartolom del Presidio has power crept it out of the format
Filter lands are likely the next best to add in and after that the humble check lands or the scry lands would be my advice
Foils are growing at the same rate if you like that kind of thing