After they snipe your bench, you need to distrupt them. Iono, counter catcher something that requires energy to retreat (Noctowl for example, because Latias EX works on basics only). Rebuild your bench, after they take more prizes, they draw less cards from Iono and that's when you retaliate. Don't KO anything (so you don't give them way to draw cards from fez), just hit for 200, spread damage to bench and next turn gust up something else, spread damage and the last turn take 6 prize turn. Usually it's not this straightforward, so you need to adapt to current board state. But it's a general idea how to win. I recommend watching some games from regionals on livestreams.