Most played cards in Tax Rack Aggro:

5 Decks
Mox Diamond
20 copies - 4 average
Swords to Plowshares
20 copies - 4 average
Land Tax
20 copies - 4 average
Mother of Runes
20 copies - 4 average
Soltari Priest
18 copies - 3.6 average
Soltari Monk
18 copies - 3.6 average
Scroll Rack
15 copies - 3 average
Whipcorder
15 copies - 3 average
Armageddon
13 copies - 2.6 average
Battlefield Forge
12 copies - 2.4 average
Lightning Bolt
12 copies - 2.4 average
Savannah Lions
12 copies - 2.4 average
Seal of Cleansing
10 copies - 2 average
Aura of Silence
10 copies - 2 average
Pyroblast
9 copies - 1.8 average
Empyrial Armor
8 copies - 1.6 average
Cataclysm
8 copies - 1.6 average
White Knight
6 copies - 1.2 average
Silver Knight
6 copies - 1.2 average
Grim Lavamancer
6 copies - 1.2 average