Arena tier list

1 mana
1. Worgen Infiltrator
2. Argent Squire
3. Abusive Sergeant
4. Leper Gnome
5. Voodoo Doctor
6. Elven Archer
7. Young Dragonhawk
8. Southsea Deckhand (#1 if u have weapons)
9. Murloc Raider
10.Shieldbearer
11.Goldshire Footman
12.Stonetusk Board
13.Grimscale Oracle

2 mana
1. Acidic Swamp Ooze
2. Amani Berserker
3. Dire Wolf Alpha
4. Faerie Dragon
5. Mad Bomber
6. Youthful Brewmaster
7. Ironbeak Owl
8. Bloodfen Raptor
9. Loot Hoarder
10.Novice Engineer (up to #2 if comborogue)
11.Bloodsail Raider (#1 if u have weapons)
12.River Crocolisk
13.Murloc Tidehunter
14.Bluegill Warrior
15.Kobold Geomancer
16.Frostwolf Grunt

3 mana
1. Shattered Sun Cleric
2. Raging Worgen
3. Harvest Golem
4. Scarlet Crusader
5. Earthen Ring Farseer
6. Flesheating Ghoul
7. Acolyte of Pain
8. Jungle Panther
9. Ironfur Grizzly
10.Razorfen Hunter
11.Wolfrider
12.Ironforge Rifleman
13.Thrallmar Farseer
14.Tauren Warrior
15.Raid Leader
16.Silverback Patriarch
17.Dalaran Mage
18.Magma Rager

4 mana
1.Senjin Shieldmasta
2.Spellbreaker
3.Dark Iron Dwarf
4.Chillwind Yeti
5.Ancient Brewmaster
6.Stormwind Knight
7.Dragonling Mechanic
8.Gnomish Inventor
9.Cult Master
10.Silvermoon Guardian
11.Mogushan Warden
12.Ogre Magi
13.Oasis Snapjaw (#7 in hunter)
14.Dread Corsair (up to #3 with lots of weapons)

5 mana
1. Fen Creeper
2. Venture Co. Mercenary
3. Silverhand Knight
4. Stranglethorn Tiger
5. Frostwolf Warlord
6. Gurubashi Berserker
7. Stormpike Commando
8. Darkscale Healer
9. Spiteful Smith
10.Booty Bay Bodyguard
11.Nightblade

6-7 mana
1.Frost Elemental
2.Stormwind Champion
3.Boulderfist Ogre
4.Lord of the Arena
5.Reckless Rocketeer
6.Archmage
7.Windfury Harpy
8.War Golem
9.Core Hound
10.Priestess of Elune