Other things of note:

Raging Strikes is a great buff granted by level 4 Archer, 20% increase to dps for 20 seconds don't pass that up.

Convert is good for getting extra casts in or if you run out of mana in a high mobile fight because of stacks dropping.

Thundercloud procs should only be generally used in mana regeneration phase, as it takes two global cooldowns to recover all of your mana.