I'd say moonkin druid - IIRC talented Starfire and Fireball have the same cast time, as do Scorch and talented Wrath. Then you get Moonfire+Fireblast as instant cast dots, or you could macro moonfire+icelance and insect swarm+fireblast. Arcane Int+Mark as beneficial buffs, Evocation+Innervate for mana recovery, moonkin aura helps the mage, cyclone+sheep as CCs, etc..