Most played cards in Jeskai:

2 Decks
Lightning Bolt
8 copies - 4 average
Chain Lightning
8 copies - 4 average
Counterspell
8 copies - 4 average
Volcanic Island
8 copies - 4 average
Plateau
8 copies - 4 average
Tundra
8 copies - 4 average
Swords to Plowshares
7 copies - 3.5 average
Red Elemental Blast
7 copies - 3.5 average
Blue Elemental Blast
7 copies - 3.5 average
Disenchant
7 copies - 3.5 average
Nevinyrral's Disk
4 copies - 2 average
Power Sink
4 copies - 2 average
Mishra's Factory
4 copies - 2 average
Relic Barrier
4 copies - 2 average
Howling Mine
4 copies - 2 average
Disintegrate
4 copies - 2 average
Fork
4 copies - 2 average
Island Sanctuary
3 copies - 1.5 average
Control Magic
3 copies - 1.5 average
Armageddon
2 copies - 1 average