Awesome list
I am curious how subjective the list is, and if you used data from tournaments. Anyway, very good job!

Here are some random comments (decks = Tier 1 - Tier 2 decks):
Which decks play Fiend Hunter, Spectral Lynx, Serum Visions or Boartusk Liege
Which decks need >4 Armageddon, and why 4 Ravages of War;
There are decks featuring on Past in Flames (3 or 4 copies), and/or more Tendrils of Agony;
Some combo decks want 8 Chants (4 Silence);
Manaless Dredge has Phantasmagorian, Nether Shadow;
MUD can play up to 4 Wurmcoil Engine, and you missed Lightning Greaves and Spellskite;
Elves can play up to 4 Gaea's Cradle and Quirion Ranger;
Solidarity plays Opt, Peek, Impulse, Peer through Depths, Flash of Insight, and High Tide decks have Snap;
Affinity has Signal Pest and Etched Champion