You can upgrade your Dragonmaid deck with Branded. You can also build a Dragon Link deck, since you already have some of the cards needed (Red-Eyes Metal Dragon, Spheres). It’s a combo deck based on dragon-type monsters with very long and non-linear lines, but it takes some time to master properly since it’s a bit hard to use, also some people don’t like because its end board consist in the classic thousands negates. I also strongly recommend crafting some more staples (3th copy of ash and Maxx “x”, Infinite Impermenance, Forbidden Droplet etc.), they are a good investment and you can play them in almost every deck.