I have my own version of this deck but i have found that i can splinter by the 3rd on a good draw and 4th-7th turn on average, without using any rares or expensive cards... if you want more artifact destruction i suggest oxidize from darksteel (one greed destroy artifact) and molder from time spiral (works exactly like the other one if used on a land)... and if you splash black and put in some lifespark spell bombs and eradicates you have two ways of ridding their decks of land and a card draw spell...
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The deck needs to be more reliable, so any help is greatly appreciated...