Most played cards in G/W Control:

2 Decks
Sakura-Tribe Elder
8 copies - 4 average
Shining Shoal
7 copies - 3.5 average
Ghostly Prison
7 copies - 3.5 average
Kodama's Reach
7 copies - 3.5 average
Time of Need
6 copies - 3 average
Sensei's Divining Top
5 copies - 2.5 average
Wear Away
4 copies - 2 average
Celestial Kirin
4 copies - 2 average
Yosei, the Morning Star
4 copies - 2 average
Orochi Sustainer
4 copies - 2 average
Hana Kami
4 copies - 2 average
Sosuke's Summons
4 copies - 2 average
Cage of Hands
4 copies - 2 average
Otherworldly Journey
4 copies - 2 average
Sachi, Daughter of Seshiro
3 copies - 1.5 average
Hikari, Twilight Guardian
3 copies - 1.5 average
Honden of Cleansing Fire
3 copies - 1.5 average
Seshiro the Anointed
2 copies - 1 average
Umezawa's Jitte
2 copies - 1 average
Kami of False Hope
2 copies - 1 average