This is the deck I used to get from diamond 3 to master this month (33:14). The deck is just your standart Keelo deck with a lot of good utility units that are searchable by Keelo, some card draw and protection. The market contains some silverbullets (like Menace or Burden) and some general good units that you can search with Keelo. Try to focus on time influence early on and find the other 3 based on your hand (2 justice, 1 primal (2 for some market cards), 1 shadow (2 if you draw Blight or Spite and if you market Menace)). Your main wincons are overwhelming value with Keelo (or even without Keelo sometimes) or Menace out of the market.
Godd luck and have fun!
Dizo, Cabal Racketeer was pretty good for me, though I also had non-keelo ways to sacrifice stolen units. Purgedriver is another pretty good one-of