That feel when I leveled Arcanist to 15 first. But yes, It's Archer that you need.
I usually go Thunder II - Blizzard - Swiftcast - Fire III - Raging Strike (Archer skill) - Fire I Spam - Convert - More Fire I.
This is what I think works best for DPS, after all mana is gone Transpose back to Ice, Blizzard and when mana is full again start over.