i need help im die instant on t4 maps cant kill bosses

hello guys i have a Problem with my shadow i die alot and have hard times on even t4 Maps the next skillpoints go all in the big life tree at the Bottom do you think this will help? a saw a guy porting through t16 Maps with this build but i cant get even t4 bossen what do i wrong?

Its impossible to give advice unless we know what kinda of build you are running.

I suspect you don't have your resistance capped at 75 % , it's the primary source of easy death

To make your life a little bit more easy, you need to be capped at 75% at all res, at least 4k-4.5k hp, and try to dodge maps with pshys or elem reflect.