Blue/Black Mill-Control Deck

[lifebaka]

Okay, one of my friend's older brothers is building a macked out Sliver deck, and me and my friends are all trying to figure out how we're going to beat it. Let's face it, Slivers own badly. And, since he's spending something like $350 to complete the thing, he's going to have all the good Slivers (Queen, Overlord, Muscle, Blade, Root, Plated, etc.). My idea to beat this was a blue/black control deck. After building I found out that the deck was basically control as stalling, and then it wins through mill (kill my opponents deck, so they deck out). Anyway, I know mostly how I want the deck to play, but I don't know if I want to put any Dimir cards or something in it. I'll include the current build of the deck, as well as how I plan to build it here.

Current:
Deck:
Island x10
Swamp x10
Counterspell x4
Vex x4
Dispersal Shield x2
Fill with Fright x3
Talisman of Dominance x3
Chomatic Sphere x2
Serum Visions x2
Quicksilver Elemental x1
Nezumi Shortfang x1
Confurer's Bauble x2
Wrench Mind x2
Raven Guild Master x1
Kuon, Ogre Ascendant x1
Sundering Titan x1
Mindslaver x1
Diabolic Tutor x1
Thought Dissector x2
Beacon of Unrest x1
Darksteel Reactor x1
Hollow Specter x1
Distress x1
Reiver Demon x1
Keiga, the Tide Star x1
Sideboard:
Talisman of Dominance x1
Night of Souls' Betrayal x1
Mind Rot x2
Conjurer's Bauble x1
Wayfarer's Bauble x1
Wizard Replica x2
Worldslayer x1
Feroz's Ban x1
Serum Visions x2
Spectral Shift x2
Callous Oppressor x1

Now, the way I want to build it is this, which will have more of a few cards, a lot less of some, and mostly just new stuff.

Future:
Deck:
Island x10
Swamp x10
Counterspell x4
Vex x4
Dispersal Shield x4
Fill with Fright x4
Leyline of Singularity x2
Nezumi Shortfang x3
Beacon of Unrest x2
Beacon of Tomorrows x1
Talisman of Dominance x4
Raven Guild Master x3
Mindslaver x1
Thought Dissector x2
Diabolic Tutor x2
Keiga, the Tide Star x1
Reiver Demon x1
Conjurer's Bauble x2
Sideboard:
Mind Rot x3
Wizard Replica x2
Serum Visions x4
Spectral Shift x2
Sundering Titan x1
Kuon, Ogre Assendent x1
Night of Souls' Betrayal x1
Callous Oppressor x1

Tell me what you think, possible additions, anything you can think of. I realize this is a lot to read, but I just spent twenty minutes typing it, and it'll only take five to read, max.