Most played cards in Rogue:

2 Decks
Malevolent Hermit
8 copies - 4 average
Thought Lash
8 copies - 4 average
Force of Will
8 copies - 4 average
Thassa's Oracle
8 copies - 4 average
Lotus Petal
8 copies - 4 average
Paradigm Shift
7 copies - 3.5 average
Shelldock Isle
7 copies - 3.5 average
Brazen Borrower
6 copies - 3 average
Impulse
6 copies - 3 average
Jace, Wielder of Mysteries
6 copies - 3 average
Ancient Tomb
5 copies - 2.5 average
Daze
5 copies - 2.5 average
Sphinx of Foresight
4 copies - 2 average
Narset, Parter of Veils
4 copies - 2 average
Preordain
4 copies - 2 average
Leyline of the Void
4 copies - 2 average
Chalice of the Void
4 copies - 2 average
Hurkyl's Recall
3 copies - 1.5 average
Force of Negation
3 copies - 1.5 average
Saprazzan Skerry
3 copies - 1.5 average