PoE Forbidden Shako, Cold builds without Ice Bite, Impending Doom

I've been working on this build for a bit over a week now, spending more time in POB and trade than actually playing several of those days. I've been wanting to post it here for a while, but I wanted to see how far I could push it first. I've nearly reached the end of what I can reasonably change with my current understanding of the game however, and a few people in another post were requesting a pob, so I've decided to post today. First things first, this is a Trickster with a Ralakesh/Replica Badge core with a current charge count of 12/12/5. I've managed to hit 90/90/90/76 res, 100% spell

TL;DR| Pob link here: ---|--- Quick Explanation | A level 24 creeping frost skill gem is used to simulate the expected damage of a level 20 FB skill gem (based on comparisons with Searing Bond.) On Shako, I've added a 410% more damage over time modifier to simulate the level 30 version of the skill (based on searing bond's scaling.) There is a non Shako version under the Default tab, which is just a down-grade in practically every regard. Both use Supreme Ostentation, because league reasons. Build is fully built, but not optimized. There is almost certainly better