No, i agree the mill has been less then good. I mean, i have an incarnation of this now that runs Stoneforge Mystic, Sword of Body and Mind (need to toss that into this version actually), and wall of omens. I mean, Venser is nice for resetting a greed used Jace, a Tumble magnet, a Sphere of the Suns, and for Contagion clasp silliness, but no... i could most likely cut him down to 2 or 3. I mean, ideally getting his ultimate off would be a back up win.
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I suggest Leyline of Sanctity over Ivory Mask. It can possibly end up being free. If you can, add moment's Peace, as a fog that can be used twice is very annoying. Have a way to prevent your opponent from shuffling their GY into their library. Relic of Progenitis, nihil spellbomb, or tormond's crypt are all good choices to sideboard.
Prototype Portal was a consideration, as would love mass producing Grindclocks, shriekhorns, and timble magnets. Have enough artifacts to run Stoic Rebuttal. Mana Leak is also good. Hard part is trying to kep it still be a mill deck
If you can com e up with any other cards to add, let me know. Also if you can think of any other abusive color based cards that i can change around to use, please post them too.