Working On Chaos Bow Dmg Scion Need Some Advice

Don't really have the gear laid out yet I just kinda plugged in some pieces I have.

Here's the POB though, sorry I've only been around like 3 weeks this is still all new to me.

My personal recommendation if you're a new player is don't try to craft your own build from scratch, it'll probably end up weak.

I can already see lots of redundant pathing wasting talent points by going in circles, and gem supports that are questionable, like greater multiple projectiles on scourge arrow (it really doesn't need it once you understand how the skill works, it will be just a damage loss) and decay (it's one of the noob trap gems that's rarely good for anything).

Also Scion has absolutely zero synergy with chaos damage builds.

I can link you a few chaos damage builds that work and you can decide if you like any of them:
Poison Scourge Arrow Pathfinder:
https://www.pathofexile.com/forum/view-thread/2551841
Toxic Rain Trickster:
https://www.pathofexile.com/forum/view-thread/2467666
Casutic Arrow Raider:
https://www.pathofexile.com/forum/view-thread/2077932

I think that covers the most common chaos bow skills. Authors of guide #1 and #3 are very helpful from my experience, and in guide #2 the author is inactive but there's a guy named Grimjack who pops here and there and answers most questions. So I'd fullyheartedly recommend any of the 3.

It's always easier to pick a build to follow then try to make tweaks to it rather than try from scratch, you didn't even plug the gear in your POB yet, and there's a lot of things that could go tricky there.