Need Help to get stronger - Ground Slaming Serker

Hy Guys,

i am playing POE for several years now, and every season i get to a point where i cant make anything up to make my build any stronger - i somehow hit that point right now and i dont know what to aim for as my next goal to keep getting stronger - in terms of offense and defense i want to get better.

https://pobb.in/5q8Ll1jFYKWE

Here is my POB link, maybe someone can help me out and make me happy with any advices you can give

I love POE but i didnt study it, so sorry for maybe obvious mistakes
Farmin Delve and Essences for currency right now, but i never got more than 10 Divines in my chest - if any tips on how to get currency faster can be given, i would also very much appreciate it

All help is welcome - thanks in advance