That’s why you need to follow my guide to a letter
Here you have two major things that are bringing you down. First, for some reason you haven’t invested in War Cry. You need it, especially for shards. Don’t invest into Markovian Advantage, it’s a single target wps that is only worth 1 point with all your skill bonuses to it.
Secondly, just 10% slow res. You are being slowed to a grinding halt by debuffs meaning that your attack speed and adtch drops a lot.
You also need Serenity with %DA roll here, 2700 DA is a bit low for a build like that.
https://www.grimtools.com/calc/eZPME0dN - here is how it should look with your current set of gear. If you can’t craft Serenity with %DA bonus, use one Ravager’s Eye augment (from Barrowholm) in sword.
I have also noticed that your Assassin’s Mark was unbound. Maybe it’s just grimtools bug, but if it’s indeed unbound in-game it can be a big reason why you keep dying.