This build focuses on speed plus decent range nukes and should be used in all low- to mid-level missions except those with large maps.
Use your 4 to nuke while keeping your health topped off with the healing from your 3. For this level content, there is not need to deal with the hassle of managing your 2, the heals from Healing Flame should suffice.
Be sure yo equip Amalgam Serration in your primary for even more speed!
Zenurik and/or Arcane Energize are highly recommend; but the second arcane can be swapped out for pretty much anything.