Thanks to Fire Blast's synergy with the Hot Streak this Talent is the best choice for Single Target DPS that also boosts your AoE Damage potential, as it provides you not only with more Hot Streak procs, but also greatly increases your control over them PvE Fire Mage Talents & Builds - (TBC) Burning Crusade 10/48/3 Flame On - Gives your Fire Blast an additional charge and reduces its recharge time by 2s. Below is the spec you will want to use at first until your gear allows you to have enough mana to sustain Icy Veins.

Mages will generally choose Fire as their main spec until later in the Expansion when they start obtaining better gear.