Vaal Power Siphon has no projectile limit, and shotguns on returning - potential build?

hello

I was toying around with final build ideas and stumbled upon this.

Skill Functions and Interactions

Vaal Power Siphon fires one projectile at each enemy -... However each set of projectiles is able only to hit the enemy it targeted, and only with a single projectile.*

But, stay with me:

Other support gems that create or modify projectiles, such as Chain Support, do result in each projectile being able to hit more than one target.

And lastly,

In terms of the range meant by "nearby" enemies, Vaal Power Siphon will target at least all enemies onscreen.

Something that does modify projectiles is, of course, Returning Projectiles Support

So.. It's weird.

Nobody has mentioned Vaal Power Siphon (VPS) in like 7 years. This skill is insane. Besides the obvious downside of being locked to atlas mapping with the sextant, I wish more people talked about vaal skills as main skills. You can check my profile for a 100% showcase where I use primarily vaal BV as well.

With VPS there is no limit to projectiles that can be created, assuming enough monsters. Additionally, the auto-targeting range extends to, in my testing, just barely beyond the observable screen. And since all this projectiles shotgun on return, it's made for a surprisingly solid farmer.

I'm looking at building this character out using the skeleton of an int stack wander, since there's already so much overlap. It would obviously excel at breach and legion which is perfect for the current Breach on the Beach meta that's popping right now.

I'm currently testing what optimal links look like, since I'm only concerned about the vaal portion of PS. I've obviously abandoned the usual barrage setup, so I've been tinkering around to see what looks good. Any suggestions appreciated!

I will likely try to turn this into an actual build when I figure out how best to scale VPS. If anyone wants a juiced map showcase of what I have so far I can make that as well.

PoB is here, but there isn't much to see. it's basically a copy paste of an int wander for the meantime. https://pobb.in/T4V3di_OPucN

Cheers