need help with sunder build

hi,

i was away some years from poe and would like to start playing again.

https://odealo.com/articles/sunder-juggernaut-marauder-2h-build-odealos-crafty-guide

i used this guide my normal resis are capped

what i currently missing is the jewels and pantheon

the gear is :



my life is low only 4k atm the tooltip on sunder shows only 40k dps buffed.

i get oneshoted can someone advise me please what i doing wrong

thanks