Most played cards in Ascension Combo:

2 Decks
Scalding Tarn
8 copies - 4 average
Pyromancer Ascension
8 copies - 4 average
Remand
8 copies - 4 average
Serum Visions
8 copies - 4 average
Blood Moon
8 copies - 4 average
Steam Vents
8 copies - 4 average
Ponder
8 copies - 4 average
Rite of Flame
8 copies - 4 average
Lightning Bolt
8 copies - 4 average
Magma Jet
8 copies - 4 average
Manamorphose
8 copies - 4 average
Echoing Truth
7 copies - 3.5 average
Muddle the Mixture
6 copies - 3 average
Peer Through Depths
4 copies - 2 average
Desperate Ritual
4 copies - 2 average
Electrolyze
4 copies - 2 average
Vendilion Clique
3 copies - 1.5 average
Cascade Bluffs
3 copies - 1.5 average
Grapeshot
3 copies - 1.5 average
Firespout
3 copies - 1.5 average