Most played cards in Jeskai:

5 Decks
Flooded Strand
20 copies - 4 average
Polluted Delta
12 copies - 2.4 average
Bloodstained Mire
12 copies - 2.4 average
Jace, Vryn's Prodigy
12 copies - 2.4 average
Dig Through Time
11 copies - 2.2 average
Dispel
11 copies - 2.2 average
Crackling Doom
10 copies - 2 average
Lightning Strike
10 copies - 2 average
Kalitas, Traitor of Ghet
8 copies - 1.6 average
Disdainful Stroke
8 copies - 1.6 average
Inspiring Vantage
8 copies - 1.6 average
Mantis Rider
8 copies - 1.6 average
Smuggler's Copter
8 copies - 1.6 average
Mausoleum Wanderer
8 copies - 1.6 average
Thraben Inspector
8 copies - 1.6 average
Spell Queller
8 copies - 1.6 average
Spirebluff Canal
8 copies - 1.6 average
Selfless Spirit
8 copies - 1.6 average
Reflector Mage
8 copies - 1.6 average
Prairie Stream
7 copies - 1.4 average