4 Bile Blight is too much and this would have problems facing RG Monsters where the toughness of creatures beyond the mana dorks has 4 or greater. 2 to 3 should be enough. I suggest Hero's Downfall or Ultimate Price as replacement

Consider Wall of Frost over returned Phalanx.

updated, played this deck on sat 2-2 the loses was to EsperControl game them both a big run for their $$$. I want to add Quicken

Why no Dimir Charm ?

only thing about the charm I like would be the last choice. I have counter in my side and already have enough kill spells. thanks for taking an overlook of my deck. It's been rather competitive on friday nights. I'll get the decklist right after trial and error.

Am I missing something? Where's Phenax?

Nope, I have been running 3 of him these past 4 weeks at FNM and honestly it's done me nothing. I've changed the deck each week slightly this will be my next weeks attempt.

Remove Omenspeaker in favor of Thassa, God of the Sea . Scry every upkeep is better than scry 2 once, and she has the added bonus of indectructible and her ability to make unblockable.

I would drop a desecration demon in favor of another consuming aberration.

Jace, Memory Adept seems more useful than Ashiok, Nightmare Weaver . So much more mill per turn, ability to give card advantage,

yeah; in earlier versions of the deck I was running 2x jace. it's the amount of 5 drops already in the deck. it's been tuff calls trying to make this deck work correctly.

hmmm. maybe do a 1-of jace with 2 ashiok?

Also, how helpful is Codex Shredder in practice? seems like its spot could be used better

If you're looking into post-nyx edits, King Macar, the Gold-Cursed could probably fit in here. if he hits the board with phenax in play you've got some consistent manaless removal.