OmniShot Help!

POB: https://pastebin.com/wRmwEJuw

I made a venom gyre deadeye for league start, made two more characters and got some money to buy an omni because I wanted to make a zoomy mapper. I respecced a bit and crafted some decent gear to get me to 2k omniscience.

My problem is that I cannot clear a T14+ without getting rushed, stunned, and killed. I would really appreciate it if someone who knows a bit about the build give me some advice, maybe tweak my PoB and i'll follow that.

Thanks!