[Help] Slayer Shield Crush - Massive DPS gap between my build and the reference - What am I missing?

I recently leveled a Slayer to switch from my Juggernaut Shield Crush, after seeing some builds hitting 60M+ DPS. I tried to replicate this reference build:
Reference: https://poedb.tw/pob/lzafaPcIpM
My current build: https://poedb.tw/pob/cT42UEfkCI

The gap is staggering — the reference hits ~60M DPS while I'm sitting under 1M, and my old Juggernaut was at 8.9M. I understand I'm not fully optimized yet nor do I have the level, but I can't wrap my head around a 60x difference.
I still have around 8 div to invest and I'm trying to figure out:

What are the biggest contributors to this gap? (keystones, specific items, gem setup?)
Are there cheap upgrades I should prioritize first?
Am I missing a core mechanic that makes this build work?

Any help is greatly appreciated!

Without having looked at it much, unless you've messed up something, it's going to be about 15 different things that multiply together to exponentially increase the damage.

I can't see it on the app without opening POB, but looks like you have less frenzy charges, because of the mirrored ring and glove corrupt, that's probably one of the starting point.

I might have time to look at it more thoroughly later if you like. I know it seems like an absurd difference if you've got similar stuff, but the way these optimized builds work is everything multiplies by an extra few percent here or there and the dps balloons out. It could be that there are a few big ones, but I think it is probably a long list.

Jewels probably have a fair bit to do with it, you dont seem to be using seething fury, which is pretty import I think. Their watchers eye looks pretty good, timeless jewel looks to be different.

If you want to test, swap their items one at a time with yours in the pob and watch the numbers start dropping. You might find which are the biggest factors. After you do a few of these, you'll probably see that number start to plumet.

Biggest issue is crit chance and crit multi.

Your build has about 40% crit chance and 400% multi
The other build has 100% crit chance and 750% multi.
Both stats are mostly scaled with the Seething Fury jewel and a better version of the shield.

Other than that, make sure both configs are the same, which currently isnt the case. Tick Frenzy and Power charges (if you can maintain both) and add Seething Fury to your build, which is a 1c item in Mirage.


That alone would get you to about 7.5M dps.
Still a long way to go for sure but you are lacking a good amount of skill points and your gear isnt as good. That wont make up for more than 50M missing dps but its a start.