I'm assuming that your mark is Entropy, yes?
1. Slim down your deck, and add more Hourglasses. Three Hourglasses are not enough for a 50 card deck -- maybe for a 40 card version, but not 50. Try to go below 40 cards as comfortably as you can; the Supernovas are supposed to get you set up earlier (take a look at PuppyChow's rainbow).
2. Eternity. If you choose to slim down your deck, an Eternity is an almost must-have to avoid decking out.
3. Sundials. Your deck is rather big and clunky, so you'll need some more early-game stalling power. Upgraded Sundials are easier on your quanta, as you don't have any other cards using
quanta, and you'll want to save up
quanta for your Hourglasses and Eternity. If you choose to streamline your deck down to about 40 cards (or even less), you can and should go much easier on the Sundials.
4. Creature base. Two Elite Otyughs, an Elite Queen, and a Fallen Druid are generally enough.
5. You can afford to lose a Fire Storm and a Protect Artifact. Oftentimes, you only need to protect your Eternity, and possibly your Hourglasses (if playing against FGs with permanent control) or Towers (when playing against Seism).