A friend (/u/Gashnik) made this build and I'm posting it here since he can't.

It's a Raider using Spectral Throw with Trinity good clear speed and can do the endgame bosses but requires good positioning for optimal damage. Requires a bit paying attention to the damage you deal to get trinity to work - you need to overlap the damage ranges of at least 2 elements, it's not hard to do with lightning damage thanks to it's huge range. Definitely not hardcore viable.

PoB: https://pastebin.com/La264fms

Budget wise he's ~35ex mainly from weapon crafting, can be done on about 10ex without too much damage loss (4.5mil with Rebuke's and Rat's Nest included in the PoB as an item set)

Scuffed Showcase: https://www.youtube.com/watch?v=-d3kQZZHwOE - messed up trinity in the video but it's fixed in the PoB so damage is higher than the showcase.