Most played cards in Esper Midrange:

1 Decks
Shambling Vent
4 copies - 4 average
Spell Queller
4 copies - 4 average
Caves of Koilos
4 copies - 4 average
Evolving Wilds
4 copies - 4 average
Wasteland Strangler
3 copies - 3 average
Gideon, Ally of Zendikar
3 copies - 3 average
Reflector Mage
3 copies - 3 average
Eldrazi Displacer
3 copies - 3 average
Transgress the Mind
3 copies - 3 average
Declaration in Stone
3 copies - 3 average
Prairie Stream
3 copies - 3 average
Archangel Avacyn
3 copies - 3 average
Sunken Hollow
3 copies - 3 average
Dragonlord Silumgar
2 copies - 2 average
Stasis Snare
2 copies - 2 average
Distended Mindbender
2 copies - 2 average
Ayli, Eternal Pilgrim
2 copies - 2 average
Silkwrap
2 copies - 2 average
Liliana, the Last Hope
2 copies - 2 average
Grasp of Darkness
2 copies - 2 average