Most played cards in White Midrange:

3 Decks
Divine Offering
12 copies - 4 average
Revoke Existence
12 copies - 4 average
Wurmcoil Engine
12 copies - 4 average
Leonin Relic-Warder
12 copies - 4 average
Arrest
12 copies - 4 average
Inkmoth Nexus
12 copies - 4 average
Mirran Crusader
12 copies - 4 average
Accorder Paladin
12 copies - 4 average
Hero of Bladehold
12 copies - 4 average
Contagion Clasp
9 copies - 3 average
Dispense Justice
9 copies - 3 average
Elspeth Tirel
9 copies - 3 average
Tumble Magnet
8 copies - 2.67 average
White Sun's Zenith
6 copies - 2 average
Sunblast Angel
6 copies - 2 average
Sword of Body and Mind
3 copies - 1 average
Sword of Feast and Famine
3 copies - 1 average
Phyrexian Rebirth
2 copies - 0.67 average