Honestly, I went through the exact same thing when I first hit 50. I tried that glass cannon Bleed build everyone talks about and spent more time looking at the floor than actually playing. Tier 4 dungeons are no joke, and if you arent careful, the mob density will just overwhelm you before you can even get your stacks up. I would suggest staying far away from the Primal Fury branch for now. It looks good on paper for damage, but without high-tier gear, the defense penalty is just a death sentence in those cramped hallways. What really saved me was swapping over to the Hardened Shell passive and making sure I had Vampiric Strike slotted. It sounds boring because the numbers arent as flashy, but it keeps you standing. Be very careful with your positioning tho... if you pull more than three mobs at once, even a tanky build might fold under the pressure. I actually had to map my panic buttons to my Razer Tartarus V2 Gaming Keypad 32 Programmable Keys just to make sure I hit my defensive cooldowns in time. Make sure to prioritize Iron Will too. It gives you that short window of invulnerability that lets your healer catch up. If you dont have that, you're basically just a liability to your group, tbh. Better to do 20% less damage and actually finish the dungeon than be a floor-tank for the whole raid.

• might want to consider Iron Will to survive without wasting gold
• Savage Sweep helps budget aggro but be careful with positioning
• Logitech G305 Lightspeed Wireless Gaming Mouse is a solid cheap upgrade

Honestly, I had high hopes for Openclaw but t4 is unfortunately a total nightmare right now. I have wasted so much gold on repairs, it is really disappointing how they tuned this. Maybe try Redragon M612 Predator RGB Gaming Mouse for better thumb button mapping tho. I started using Staggering Blow to keep mobs locked down instead of just trading hits... it is way more practical than burning through health pots every single pull. Hang in there!