PoE Gold_Way3503 builds

Hi exiles, I’m a newbie trying Boneshatter build for the first time, following Zizaran’s guide. Everything went smoothly from campaign until yellow maps. However, once I’ve reached the red map, I died quite frequently from mobs or bosses. I believe I have high armour and capped resistance which should help my build to be tankier. Grateful if you could share some tips or point out what can I do to improve my gears. Thanks in advance! POB: