3.14 sunder zerker facebraker NEED HELP

Hi guys, i tried to do a build involving sunder as main skill facebreaker and abuse exerted attack whit warbringer meccanic given by the berserker.

I hade nice time plaing it rlly destroing every mob pack and killing bosses from distances.

Currently i'am tring to do some endgame content at lvl 90 but i'am encountering some problem.

I expect sunder to do a lot of damage whit exerted attack but pob show around 3M dps. and also it seems that on bosses is not that much.
Pob link----> https://pastebin.com/4Qv2HxuB

Another issue is the degeneration given by abyssus+AOC 50%+ damage taken and i feel i need more defence, only 39% on pob by armour, maybe swap for evasion?

i rlly like sunder and the cry/rage meccanic so i don't want to go for juggernaut.

Hope someone can help me.

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