Alliance
Alliance got 3 mage races (
High Order Skyborne,
Human,
Gnome). We currently recommend
Gnome for most players.
Skyborne
Wind Blessed - 2% passive haste is massive.
Read Leyline - Was nerfed after beta went down. No longer scales with
Innervate. Should still scale with water and
Evocation. Quite good leveling racial still, potentially good in high pace dungeons/raids too.
Walk on Air - Can situationally be very useful, also lets you control your character midair.
Elemental Insight - Not unlikely some raids will contain elementals giving you a passive 5% damage increase.
Human
If you value PvP highly
Human is a fine option. The 2 other races are stronger in PvE.
Ruthless - Passive 1% crit
The Human Spirit - With no improved
Divine Spirit in this version, it's very minor for mage, but still "nice to have"
Will to Survive - Very strong PvP racial, and potentially also useful in some PvE encounters
Perception - Increases your stealth detection drastically, good talent vs
Rogue &
Druid
Gnome
Gnome which was previously the "go-to" alliance
Mage race, has gotten some competition. Gnome is still good in both PvE and PvP.
Escape Artist - Escape artist got a solid buff. It is now instant and gives you 3 seconds immunity to movement impairing effects (Roots, slows)
Expansive Mind - 5% more mana, specifically nice if you are planning to play
Arcane
Eureka! - A new on use for gnomes. 10% damage increase and 10% mana cost reduction. Can be used with cooldowns such as
Combustion or
Arcane Power in PvE, or big
Shatter setups in PvP.
Engineering Specialization - Less backfires on engineering devices. Can't really say how relevant this will be yet.
All 3 are currently simming very close to each other in PVE ,so pick what you think you will enjoy playing the most.
Horde
For horde we recommend
Orc
Blood Fury - Primary reason to play orc. Increases your spellpower by 10%, which will keep scaling as the game goes on. Can be used with big cooldowns such as
Combustion and
Arcane Power
Hardiness - Shorter stun duration, mostly useful in PvP facing
Rogue or
Paladin
Shatter Curse - Defensive cooldown which could come in handy in PvE, but more often in PvP facing
Warlock or
Priest.