My quasi-farming solo build for Diviner's Ascent, which kills sand drakes, jade scarabs and rockshots easily. I do this more for fun and the challenge of staying alive than serious farming, though.
Fastcast 9
Illusion 13 (or 14)
Inspiration 11
Mantra of Persistence
Crippling Anguish [E]
Phantom Pain
Conjure Phantasm
Inspired Enchantment (or Drain Enchantment, it doesn't matter)
Energy Tap
Illusion of Weakness
Ether Feast
Enchanter's Armor
Performer's Gloves
Vokur's Staff
The primary target is the sand drakes outside of Elona Reach, but can take down rockshots and jades as well. The strategy involves a lot of hit-and-run strafing and kiting as you degen the target to death, as staying too close to the drakes will hit you for 105 damage per Aftershock attack (or 81 damage if the +15AL from the Performer's Gloves kicks in).
I can take down 2-3 drakes at once with this build, so long as I'm watching where I'm going. Still, you can get nasty surprises like five rockshots burrowing up under you at once. For rockshots, just run until they stop following. Then target one and start degening it, maintaining your strafe and kite tactics. It will hit you with Distracting Shot when you try to cast, however, but after that you have an 8-second window to slap more hexes on it until its Distracting Shot refreshes. Always watch out for where they lay their traps. Unhappy things happen if you step into one.
And I just find casting Crippling Anguish on drakes hilarious.