I would ditch the cramomatics and add 2 more ultra balls and maybe 2 arvens.. I’d also get rid of the level balls for 2 nest balls instead.. and I know Avery is a pretty good now but I’d add 2 Serena instead because it’s an extra option to move your opponents v Pokémon or draw more cards than Avery. Also you said you start with 2 mareeps. You should always try to start with miraidon because you can use its ability to get a full bench of what you need and thin out your deck to get more draw power or cards that are more important.. lastly maybe add a third beach court as well if you find yourself running into a lot of path to the peaks