Need help with poison spark

Hi all, so I decided to try and make my own build for the first time ever and decided I wanted to remake the poison spark build that was popular a few years ago. Basically looking for constructive criticism on the tree and unique choices.

PoB: https://pastebin.com/kvCBBikF

Like I said this is my first attempt at making my own build so I'm sure theres quite a few things wrong with it.