Most played cards in RUG Midrange:

1 Decks
Force of Will
4 copies - 4 average
Brainstorm
4 copies - 4 average
Daze
4 copies - 4 average
Lightning Bolt
4 copies - 4 average
Dragon's Rage Channeler
4 copies - 4 average
Ponder
4 copies - 4 average
Wasteland
4 copies - 4 average
Misty Rainforest
3 copies - 3 average
Scalding Tarn
3 copies - 3 average
Volcanic Island
3 copies - 3 average
Stifle
3 copies - 3 average
Tropical Island
3 copies - 3 average
Force of Negation
3 copies - 3 average
Uro, Titan of Nature's Wrath
3 copies - 3 average
Murktide Regent
3 copies - 3 average
Soul-Guide Lantern
2 copies - 2 average
Pyroblast
2 copies - 2 average
Carpet of Flowers
2 copies - 2 average
Brotherhood's End
2 copies - 2 average
Wooded Foothills
2 copies - 2 average