Yeah, it's not as fast as a Grabby or Golem rush, but it's cheaper by far. If you don't have Arsenic, than you lose a bit of speed. Feel free to put in any moderately cheap Death cards you want in those 3 slots. You also could add another Death pillar if you find yourself low on quantum frequently.
Main weaknesses to this deck is early RoF/Plague, any kind of quint'd creature control creature (i.e. Oty, Parasite, Mind Flayer, etc.), Owls' Eye, extremely fast and heavy creature spam (you only have 6 Freeze), decks with lots of healing (Empathic Bonds, Miracles, etc.).
As far as strategy, use your Freezes first for anything that threatens your Chrysaoras; second on strong creatures like Dragons and growing creatures. Fire is always risky. If you think he has RoF, you can always play only 2 Chrysaoras at a time holding the rest in your hand.