What I'm doing wrong with my Deadeye?

Apparently Deadeye is the OP build this patch, but I can't for the life of me do the last Simulacrum level.

I'm aware that this is 95% skill issue and 5% build issue, but any help is greatly appreciated.

This is the build that I'm running https://maxroll.gg/poe2/planner/852s00cs . Could anyone let me know what I should upgrade or change?