Seismic Trap Crit issue

Hey everyone. I'm following Path of Matth's seismic guide, however, i'm trying to expand a bit on the high end.

This is the first time playing a seismic trap build, hoping to focus on bossing only.

Main issue I'm having is with damage. It takes me probably 60 seconds to kill normal eater. My crit chance is stuck around 31% with 305% multiplier.

How in the world is he getting crit to over 90%?

May just be i'm ignoring PoB and looking at the defense tab in the game:

https://pastebin.com/r3qEJJJC

Any other advice from other trappers out there?