Play like a mill deck or play like a OTK deck, this deck is flexible, and wins!
Vs aggro don't cast coldlight oracles. Go for the burst damage that you have.
Save Vanish for after Valeera if possible.
For control games aim for fatigue win, but if burst win is available, close it up and win.
Valeera is amazing for adding in that extra burst damage with Leeroy, Cold Blood, and Stonetusk boar, Faceless Manipulator.
In theory you can burst Boar(1mg) + coldblood (3x4dmg) + faceless manipulator for a total of 26 damage. But in all honesty i've won in so many different ways.
For a fatigue win, with valeera you can cast Shadowblade, coldlight oracle, coldlight oracle, shadowstep, coldlight oracle, once he's drawn his whole deck. Make him draw 7 cards for whopping damage (and you take none with shadowblades), if he has just drawn his last card that's 1+2+3+4+5+6+7 damage for a total of 28 damage. if he has 1 card left that's 21, if he has already taken 1 fatigue damage, then its 35 damage. Do your math and kill him with this quick blow.