Need help with a build

TL;DR What can I change about my build to make it more tanky without sacrificing too much DPS? I'd like to end up using Inpulsa's cuz it's a huge damage buff but I've also considered crab carapace for the big defensive buff.

So I made my first build this league, here is the PoB for the finished build: https://pastebin.com/8zRb1Gu6

And here is my current character: https://pastebin.com/5ybkdTSG

It's a full fire conversion Double Strike Berserker (lol) with 2x Razor of the seventh sun and Avatar of Fire.

My problem is I'm squishy af. I have 6k life and more than enough damage to quickly clear packs and basically one shot map bosses but I die ALOT. Now I'm not going to pretend that I'm playing perfectly and trying to dodge absolutely everything but in many cases I get one shot by random stuff that I have no idea is happening because I cant see it or it's too fast (i.e the mobs that shoot those red spikes that cover your entire screen in Vaal Pyramid map). I have vaal pact but in many cases my single target leech doesn't heal enough to face tank some unique mobs and map bosses such as the boys on Lighthouse are a nightmare, as I have to drag each of them away to kill them 1 or 2 at a time or I'll instantly die.

I don't have huge issues while clearing maps generally cuz I kill stuff so fast and leeching on big packs of mobs gives you heals through the roof, but there are certain mobs that absolutely dumpster my character that I can't do anything against and many unique bosses punch me in the face for 90% of my HP (and I'm not talking about the big slam attacks or anything like that I literally mean their "auto attack" type punch does more than half of my hp in most cases".

Thanks.

You're probably dying because of the abyssus.

And if you're dead set on keeping abyssus, get one with the lowest possible increased phys damage taken roll.