Most played cards in Jeskai:

3 Decks
Chain Lightning
12 copies - 4 average
Lightning Bolt
12 copies - 4 average
Disenchant
11 copies - 3.67 average
Swords to Plowshares
11 copies - 3.67 average
Tundra
11 copies - 3.67 average
Volcanic Island
11 copies - 3.67 average
Plateau
11 copies - 3.67 average
Red Elemental Blast
10 copies - 3.33 average
Blue Elemental Blast
10 copies - 3.33 average
Mishra's Factory
8 copies - 2.67 average
Counterspell
8 copies - 2.67 average
City of Brass
6 copies - 2 average
Control Magic
5 copies - 1.67 average
Power Sink
4 copies - 1.33 average
Serendib Efreet
4 copies - 1.33 average
Psionic Blast
4 copies - 1.33 average
Howling Mine
4 copies - 1.33 average
Fork
4 copies - 1.33 average
Nevinyrral's Disk
4 copies - 1.33 average
Relic Barrier
4 copies - 1.33 average