Here's my take on the recently discovered shenanigans with minimum charge Discharge:

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WARNING: Mute sound or hear me clicking and breathing into my mic

updated t16 with mic off: https://youtu.be/kf7bZDVUA08

normal maven: https://www.youtube.com/watch?v=fUxlrQLjFDU

POB: https://pobb.in/VfkkYIWn8OH5

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For those unaware: There is a bug that will be fixed in 3.20 that allows you to "spend" negative minimum charges on discharge. Allowing you to endlessly discharge with damage equal to negative minimum charges.

Most builds I saw used this to easily get fat selfcast discharges. (which is probably just better). I went the route of using the trigger craft on a weapon. Generally, this would put your spell on an 8 second cooldown but the threshold jewel "endless misery" overrides the cooldown to just me a fixed 250ms. (Afaik, this is not a bug and will not be changed)

In order to combat the heavy mana costs, a devouring diadem is used. Coupled with inquisitor double regen, this solves the mana problems. A mageblood combined with reduced mana cost flasks may also be a feasible approach for higher budget.

Devouring diadem however allows us to reserve all of our mana AND use a divine blessing aura as well, enabling this build to use 4x 50% auras in addition to max level vitality, precision, defiance banner and petrified blood.

The tree basically picks up a bunch of spellcrit and spell suppression. I am certain that this tree could be optimized - I've not spent much time on it.

The rest of the gear should be self-explanatory, but feel free to ask questions.

The build feels just fine while mapping, having enough survivability and blasting bosses quickly. A similar playstyle could be achieved by just playing palsterons ignite shield charge which is vastly superior in terms of speed and prolif clear.

Damage for pinnacle bosses feels quite flaccid. This could be improved with more investment, however.

All in all, this is a rough template to get a working build together. I didn't put enough brain power into this to even remotely claim that this is remotely close to the "best" version of this build.