I can do P3 max atm. I don’t even have a spirit monarch yet. Every armor and weapon rack I go to drops the same item. It’s different at each rack. The racks by meph always drop a white diamond mail and a white poleaxe. The racks at countess always drop a horned helm and a targe. Etc, etc…
What are you running? Blizzard sorc?
Also, you can run p8 kurast for sure, you don't need to kill anything. You said they always drop the same items. Are you sure you havent accidentally set a -seed parameter on your game? Thats the only way that would be happening. Google "how to set map seed in d2r" and then check if you have anything in that field.
After that, reset your maps. You can do that by making a game in nightmare then leaving and going back to hell difficulty. All new maps.