I know y'all like ball lightning builds. What about a Lightning Ball?

I quickly got bored of all the builds I played this league so I decided to return to my roots and make an Arc Archmage Elementalist. Well, Pledge of Hands felt like shit to me, so over the past few days, the build evolved into a Dodgy Arcssassin, stacking power+frenzy charges.

https://pastebin.com/mTgKtKZF

I've spent ~20ex on the build so far, but you can get decent results with 12-15ex as well. There is still a lot of room for improvements, but I thought the build is in a state where it is worth sharing. I was planning to switch to Farrul's Fur, but I think Inpulsa is better for clear. I might put a bossing gem setup in one as a switch. Maybe even with ball lightning?

Might next upgrade will most likely be to annoint Charisma, that way I think I could run Aspect of the Cat as well (instead of precision) and still have enough mana left (108 if I'm correct) to cast anything I need, but I might also need to get a bit more mana recovery from somewhere for that to feel comfortable