Hello!
This is the first deck I'm building after taking a long time off of the game. That being said, the extra and side decks will most likely be tweaked once I see how it runs.
My thought process is that the deck should be able to swarm a few gems fairly easily for fusion, xyz or synchro. It's mostly earth support, but has a few other options if the situation calls for it.
Please let me know suggestions for side deck and card quantities if you think it would run smoother!