I think you should focus on either discard or milling. I can't help you with milling as I never played it, but I can definitely help you with discard. First, drop all your milling allies.
If you go traitor your discard abilities should look like this:
4x Lose Control
4x Touch of Darkness
4x Crushing Shadows
4x Mental Anguish
4x Mist of Corrosion (not just a discard, but an effective removal mid and lategame.)
Your ally control should move along these lines:
2-3x A Taste of Divinity
3x Mikael the Blunt
2-4x Melt Face
2-3x Spiritual Domination
For ability and equipment, well it's a harder job:
2x Seer's Signet or Bringer of Death
Guess you'll need some heal as well:
3x Greater Heal or 4x Dawn's Grace or 4x Heal (or actually whatever you prefer)
For win conditions you have a few choices:
3-4x Voidfire Wand
2-4x Spelunker Maddocks
2-3x Illidan Stormrage
And for quests:
Use Auchindon Spirit Towers to get rid of Silvermoon City,
Use The Root of All evil for quests,
Forces is a must, you should drop orders and include 2-3x Corki's Ransom, against opposing discard decks.
I won't give you a full decklist, as it depends on your card pool and budget, and what you prefer to play. Good luck with the deck.