PLayed in a booster draft yesterday and wanted to know if I could have made better choices in my build. BTW I placed 3rd after being top seed.

Green:4(first four picks)
1xBearscape(foil!)
1xKrosan Avenger
1xRefresh
1xSylvan Might

Black:2
Ghastly Demise
Gravedigger

Red:2
1xDemolish
1xPardic Firecat

Multi:1
1xPhantatog

Land:3
1xAbandoned Outpost
1xPetrified Field
1xSeafloor Debris

Blue:13
1xAmugaba
1xAven Fisher
2xAven Windreader
1xBalshan Griffin
1xCareful Study
2xChamber of Manipulation
1xConcentrate
1xDreamwinder
1xPeek
1xPsionic Gift
1xPuppeteer

White:21
1xAngelic Wall
1xAnimal Boneyard
1xAuramancer
1xAven Flock
1xBlessed Orator
1xCease Fire
1xDevoted Caretaker
2xEmbolden
1xHallowed Healer
1xMystic Zealot
1xNomad Decoy
1xRay of Distortion
1xResilient Wanderer
3xShelter
1xSphere of Duty
1xSphere of Grace
1xSphere of Law
1xSphere of Truth

Wanted Blue/Green but noticed lack of good green cards but a plethora of white so I was able to switch early.

decklist;
Blue:11
1xAmugaba(MVP#1)
1xAven Fisher
2xAven Windreader
1xBalshan Griffin
2xChamber of Manipulation(MVP#2)
1xConcentrate(MVP#3)
1xPeek
1xPsionic Gift
1xPuppeteer

White:14
1xAngelic Wall(Psionic Gift target#1)
1xAnimal Boneyard
1xAven Flock
1xBlessed Orator
1xDevoted Caretaker
2xEmbolden
1xHallowed Healer
1xMystic Zealot
1xNomad Decoy
1xResilient Wanderer
3xShelter

Land:18
1xAbandoned Outpost
1xSeafloor Debris
8xIslands
8xPlains

I cant really complain too much about the performance of this deck, but it truly shined after turn five and never earlier than that. every game that I lost or was close to it, I always wanted to topdeck Animal Boneyard, but I only saw it once the entire day, while I saw Chambers every single game. The Chamber of Manipulations really only functioned as an Orim's Chant lock as no one was stupid enough to attack after I stole there big fatty when they declared their attack. Only really had a problem woth opposing two drops as the person I played in the first match and beat decided to change his deck from a similar build to mine, and go weenies galore. I played him in the semi's and lost to an amazing and risky play. He played first and on his turn two sacrificed his Ravaged Highlands for one blue mana and tapped a forest to play a Thought Eater, the had to discard in his end step and threw out a Roar of the Wurm. Needless to say, he beat the hell out me that game.