Been having fun this league doing Poison Conc on Scion, made a quick gameplay video and some thoughts on the league.
https://www.youtube.com/watch?v=SO_SdKLpr7g
If anyone is looking something easy to play on SSF, then I'd definitely recommend the skill. Real easy to scale, just get a fat life flask and you're basically done. Focus on defenses and you'll be good to go.
Here's a "in progress" POB if you want some ideas on what to do: https://pastebin.com/H94DZhJp
Core concept is real simple. Poison Conc + Greater Volley + Greater multi Proj gives 9 overlapping projectiles, +37% AOE guarantees all 9 can overlap on single target.
Void Sphere + despair and decay on hit gives extra damage and make it really easy to herd mobs together.
That's basically the gameplay loop for the build. Drop a Void Sphere into a pack, lob some poison flasks at them = profit.
I went with Scion because I hate the meta and everyone else is doing pure Pathfinder or Occultist, so I had to go at least a little different in my approach.