Hexblast blood mage

Hello guys, I was looking one day for a build for hexblast and cudn't find any so I decided to go for it anyway. And this is what I did https://maxroll.gg/poe2/planner/6e2nq07r so far. Can anyone advice what I can do to get better results at boss fights? I can do bosses but they are tricky tbh.

thanks in advance for any suggestions.

there are dozens of hexblast builds on maxroll etc. just search for them.