A full set of Blinkmoth Nexus over the Inkmoth and ancient tomb.
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I like it and run something very similar. I recommend a Bile Blight or 2, they are good against all the creature decks coming out of the woodwork.http://www.mtgvault.com/rudy88/decks/snapcasters-verdict/
I would run one Baron main and move the doom blade or ultimate price to the side board. looks solid tho
I recommend changing your creature base. Need a way to win other than mill. Also you may want to use dimir charm as it removes small creatures, counters sorceries or gets rid of key cards after they scry.