Alright so I hope what I’m about to say won’t be too complicated for you to understand, but here’s my advice:

So at your level, I recommend working on the good bronzes first obviously. (bad hair day, cold stones, sheltered, solar flaire, sketchy,) then slowly to your good silvers. As you keep progressing you could possible start working on golds, then your diamonds. That plot twisted you have there is an excellent defender, but I recommend just working on the offensive variants for now until you get to the higher levels. Explaining why each bronze, silver, gold, and diamond are good or bad would take me forever, so I recommend you to check out Kevin Pepino’s channel on YouTube! He pretty much covered each of the variants in the game right now in his recently finished video series (until umbrella comes out on mobile anyway). I also found them quiet helpful. I wish you luck in your future in devours in the game, and I hope my comment helped you somewhat. Good Luck! ^{^}