I have been working on this build for a couple weeks now and I think I finally got it to a point where it's ready to share. I wanted to play a build that would clear juiced harvest, use the updated elementalist, take advantage of the Doryani's Prototype mercenary, and was something of my own creation. I had farmed a Mageblood and dropped Svalinn, so I wanted to work those in as well.

I ended up with a self-cast Blade Blast of Unloading Elementalist to generate a significant amount of burst damage. I've got a couple PoBs below that show my initial, current, and goal, as well as a showcase video. Any feedback would be appreciated.

Initial: https://pobb.in/nEh1NriAlYbX (12 million burst damage vs uber pinnacle)

Current: https://pobb.in/f6r9beh7KeIZ (43 million burst damage vs uber pinnacle)

Goal: https://pobb.in/NWo90I4-bF3U (48 million burst damage vs uber pinnacle)

Showcase: https://www.youtube.com/watch?v=Uv90gjjXwP0

Note that the PoB is configured to -197% enemy lightning resistance (Doryani's Prototype), Haste has no reservation / Level 1 Haste, and your damage with hits is lucky (Perquil's Toe) to simulate the mercenary. Only time the merc dies is in elemental reflect maps, otherwise she's up 100% of the time. I also set the cast speed of Blade Blast to 180% reduced to simulate the need for the Blade Blasts to go off / accumulate another 10 blades from Blade Vortex (this is estimated based on my experience, I expect others could be more effective and have increased damage).

Relative to farming, I think the build is great at essence and harvest. It can do T17 with risk scarabs as shown in the showcase, but some of the mods are incredibly rippy. I would not recommend the build for risk scarab farming unless you sacrifice damage for significant increases in defense. You could also switch out the mercenary for a Zealotry variant but I like the feel of the added cast speed for mapping and I think the build does enough damage. Switching to Zealotry would probably get to around 55 million burst damage vs. uber pinnacle.