CwC ball lightning Corrupting fever. A meme or a machine?

Video showcasing the current state here: https://www.youtube.com/watch?v=27qCeGgjfAY
PoB link: https://pobb.in/t1QRwnyN12OD


Howdy folks.
This league I was looking at the runecrafts and noticed 1 mod that sounded really interesting to me as I've been wanting to make a corrupting fever build work around a staff (sire of shards) which does a similar thing.
The issue with the sire though is that it has no damage at all so it was kind of hard to scale damage.
The runeraft in question gives: "Skills fire 2 additional projectiles, and projectiles fire in random directions" and can be enchanted on maces.

Now maces aren't the best option for spells either but at least on maces you can get (physical)damage over time and multipliers so I decided to go for it even though the enchant is stupidly expensive (cost me 35div)
What I created is a cast while channeling cyclone + ball lightning + corrupting fever build.
The idea is that ball lightning flies far away and hits a lot so basically everything is instantly covered in 10 stacks of corrupting fever. I didn't expect the build to ever be great but it performs a lot better than I ever thought it would so now I am hooked and I want to see if I can scale it further.
As it is now it is a map clearing beast but the boss dps is lacking.

It performs a heck of a lot better than I thought it would especially as the dps in PoB is only listed at 1.2m dps.
Because of it performing so well though I really want to scale it further. For now survivability seems fine so I am mainly looking for tips on how to scale the dps further but any tips also on defense are greatly appreciated.