Most played cards in RG Coating:

2 Decks
Slice in Twain
8 copies - 4 average
Shatter
8 copies - 4 average
Arc Trail
8 copies - 4 average
Contagion Clasp
8 copies - 4 average
Koth of the Hammer
8 copies - 4 average
Horizon Spellbomb
8 copies - 4 average
Perilous Myr
8 copies - 4 average
Galvanic Blast
8 copies - 4 average
Oxidda Scrapmelter
8 copies - 4 average
Copperline Gorge
8 copies - 4 average
Wurmcoil Engine
8 copies - 4 average
Liquimetal Coating
8 copies - 4 average
Viridian Revel
8 copies - 4 average
Hoard-Smelter Dragon
4 copies - 2 average
Contagion Engine
2 copies - 1 average