I think the deck could benefit a lot from Tezzeret the Seeker, to say the least. Other than that, I think Quicksand is not good enough to warrant the deck space, Desert would be slightly better, and still not good enough. And definitely Mutavault over Zoetic Cavern for the same purpose. Quicksands could be Mishra's Factory. I don't like culling sun a lot, I'd rather just play another Wrath effect, like Damnation or Day of Judgment. I don't really like the artifact acceleration theme, I'd just rather have a more stable manabase (even perhaps using Reflecting Pools and Vivid Lands or Trilands) and leave room for more utility cards (after all, the deck could work on 24 lands, leaving room for 10 more cards, perhaps Obelisk of Alara for the time it can buy you). And also, I don't like Chandra one bit in this one, she's just too subpar. You could play Tidehollow Sculler, Mesmeric Fiend, Kitchen Finks and other utility/disruption creatures, and just páck 1-2 Demonfires for finishers.