Poet's Pen + Nimis CoC (PROBLEM!)

Super Fun Pew Pew CoC Build!【Poet's Pen + Nimis CoC】melting the end game content & your GPU...3.21
https://www.youtube.com/watch?v=7mFAe6Gd3Lg

Hello,

I created this build nearly exactly like in the video and im wondering why I do like 0 Bossdamage. Does somebody know the reason please, would be great.

Here is my build
https://poeplanner.com/b/ND8

Here is the build from the Videos gamer:
https://pobb.in/UB1gGTWiT05r