This build focuses on long range nukes and should be used in low- to mid-level missions with large maps.
Use your 4 to nuke the whole map 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.
If you want to use this for slightly higher level content, you can switch out [Cunning Drift] for [Power Drift] to [Sacrifice] from range for power.
If you are feeling frisky you would also replace Transient Fortitude for Blind Rage, just watch out ... this is a very energy intensive build.
In either case Zenurik and/or Arcane Energize are highly recommend; but the second arcane can be swapped out for pretty much anything.