Need help with my Arc Witch build!

hello dear POE-Community,

its my second season on POE and im very interested in some suggestions of experienced players.

Can you guys tell me any upgrades or mistakes i made with my Arc build?

Thank you guys in advance.

POB Link (hope its working, first time i did this):
https://pastebin.com/u4CECqGU

PS: If you guys need an other source of information about the build, just tell me! :)