Most played cards in Stick / No Stick:

2 Decks
Polluted Delta
8 copies - 4 average
Brainstorm
8 copies - 4 average
Fire // Ice
7 copies - 3.5 average
Isochron Scepter
7 copies - 3.5 average
Duress
6 copies - 3 average
Underground River
6 copies - 3 average
Memory Lapse
4 copies - 2 average
Mana Leak
4 copies - 2 average
Metamorphose
4 copies - 2 average
Fact or Fiction
4 copies - 2 average
Accumulated Knowledge
4 copies - 2 average
Counterspell
4 copies - 2 average
Psychatog
4 copies - 2 average
Vampiric Tutor
4 copies - 2 average
Shivan Reef
3 copies - 1.5 average
Smother
3 copies - 1.5 average
Force Spike
3 copies - 1.5 average
Cunning Wish
3 copies - 1.5 average
Engineered Plague
3 copies - 1.5 average
Diabolic Edict
3 copies - 1.5 average