How can I make an armour that reduces mob aggro range (camouflage armor)

Hi, I wanted to create an armor that, when worn, would reduce the mob aggro range, working as a sort of camouflage. This would be used in a custom modpack I'm making which also includes the mod Farsighted mobs. Is it possible to make so that the armor overrides that mod? If not then I'd need a way to change the default aggro range using mc crator