Help with my Att Stacker Build

Hi, I copied my exact items to POB and here's the link:
https://pobb.in/Da_pN3kTBs2K
Other than the single rare sapphire that I socketed, what can I replace to improve my damage specially on bosses? I currently have a budget of 65 divines. I struggle the most where rares or bosses have modifiers such as extra max life and ... etc. Any help would be much appreciated!