Ten slots at 5 mana is not good. I lost multiple games playing Bobs + Forces due to blind flips, and I wasn't even playing Street Wraiths. Once you decide to push for card advantage with Dark Confidant instead of velocity with Street Wraith you really need to evaluate your mana curve. Even Daze becomes suspect when you're drawing extra lands but can't play them out. If you want Dark Confidant I think you need to make a couple of fundamental changes: cut the street wraiths, take a hard look at your mana curve, and look into playing at least 1-2 Cling to Dust in your maindeck to help manage your life total.