Most played cards in U/W Control:

2 Decks
Wrath of God
8 copies - 4 average
Counterspell
8 copies - 4 average
Brainstorm
8 copies - 4 average
Force Spike
8 copies - 4 average
Flooded Strand
8 copies - 4 average
Temple of the False God
6 copies - 3 average
Fact or Fiction
6 copies - 3 average
Cunning Wish
6 copies - 3 average
Decree of Justice
6 copies - 3 average
Absorb
6 copies - 3 average
Damping Matrix
4 copies - 2 average
Sphere of Law
4 copies - 2 average
Renewed Faith
4 copies - 2 average
Akroma's Vengeance
4 copies - 2 average
Adarkar Wastes
4 copies - 2 average
Eternal Dragon
4 copies - 2 average
Exalted Angel
4 copies - 2 average
Stifle
2 copies - 1 average
Rebuild
2 copies - 1 average
Stroke of Genius
2 copies - 1 average