POB: https://pastebin.com/SccnSwzR
Around a week ago I decided to liquidate my assets and reroll a new build and decided on a CI Spark Trickster, with my budget I could have likely rolled an aura stacker scion/inquis sparker, but I haven't played a CI character in a long time nor have I played trickster since the rework, so I decided to roll him.
I absolutely loved playing this character, and for one of the first leagues in a long time I've finished the league without decommissioning my character. Nimis + Spark interaction is so powerful you could get a 7/7 uber pinnacle bossing character going for a fraction of the cost of my PoB.
If you wanted this build to be more hardcore viable you could easily drop around half of the damage (which is still enough to do all content with your eyes closed) and get around 1000~ more es, 42k armor & 70k evasion & curse immunity.