Most played cards in Mono Blue Architect:

2 Decks
Spellskite
8 copies - 4 average
Steel Sabotage
8 copies - 4 average
Stoic Rebuttal
8 copies - 4 average
Dismember
8 copies - 4 average
Grand Architect
8 copies - 4 average
Argent Sphinx
7 copies - 3.5 average
Treasure Mage
7 copies - 3.5 average
Precursor Golem
6 copies - 3 average
Volition Reins
6 copies - 3 average
Silver Myr
6 copies - 3 average
Moltensteel Dragon
5 copies - 2.5 average
Palladium Myr
5 copies - 2.5 average
Psychic Barrier
4 copies - 2 average
Gremlin Mine
4 copies - 2 average
Inkmoth Nexus
3 copies - 1.5 average
Myr Battlesphere
2 copies - 1 average
Steel Hellkite
2 copies - 1 average
Mindslaver
2 copies - 1 average
Wurmcoil Engine
2 copies - 1 average
Contagion Engine
2 copies - 1 average