I commented in a thread about my CI Poison Spark build the other day, and there seemed to be some interest about my approach to what is quite a popular build this league, so I thought I'd make a post.
My philosophy is that I want to hit the DOT cap, with good Wither uptime, and after that I focus on hit damage and defenses, namely in the amount of a high ES pool.
At 10.31 casts per second (11.27 with Smite active), the build is extremely mobile and generally hits the DOT cap in 2-3 seconds, depending on the arena. I eschew Awakened Deadly Ailments and Awakened Unbound Ailments in favor of Awakened Fork and Awakened Void Manipulation, so I've got higher hit damage. The Awakened Fork gives me better clear and better bossing DPS than Pierce would, and allows me to get Elevated Tailwind and Skill Duration on my boots instead. The clear is so good, I find Profane Bloom to be utterly unnecessary.
Temporal chains is completely unnecessary as well except on Uber bosses. Mapping, regular bossing, Sanctum and Simulacrum are all a breeze without it.
This build is freeze, shock, curse, and corrupted blood immune. It's got less ignite duration from Soul of Abberath. It has 88% all elemental resistances. ES on hit, along with Aegis Aurora block capped with Glancing Blows and 54.5k Armour, tops up my 9.2k ES pool regularly.
I think a lot of people would say if you've seen one CI Poison Spark build, you've seen them all, but I'm proud of what I've been able to accomplish this league. If there is any interest in how the build fares against particular content, I can probably throw up a video or two.
https://pastebin.com/q4Ga1B4X