Since you like darkness a mono 6 pest 6 vampire some steals, drain lifes, a couple eclipses, and you got a 97% win rate against Bronze,
Farm that for a while to get some rares, and collect the cards along the way. Once you have some of those, expand out to start building some of the FG , Silver, gold, once you have a solid FG farmer or Silver/Gold Farmer money starts coming easy, and you will see the game in a different light.