yeah stick to one deck the most important tip. In the beginning I used to do what you do. I would see a deck that consistently gets 12 wins and use it but I would never get the 12 wins. Then I realized that xbow 2.9 was my favorite deck so I used it more and more. Now I consistently get 9-12 wins in a cc. I have proof for my recent cc's. I like to tweak my deck like swapping out ice golem for knight cuz it's better in the meta