A fully configurable ground up rework of how Minecraft calculates armour and protection (check the graph linked below for a visual of how different the defense curve is).
With the default config, armour is nerfed slightly and protection is a lot less op (protection is now a percentage amplifier of your armour).
Attribute Fix is not required however without it the armour attribute is capped at 30 so will be neccesary if you intend to go over that threshold (if you just want to balance the vanilla armour curve you don't need to worry about it).
This is mainly designed for internal use on some large projects but you're free to use it in modpacks and raise an issue on Github if the mixins cause any problems.
This graph allows you to mess around and see what config values work best for your balancing: https://www.desmos.com/calculator/98516vuxmp
(I also highly reccomend adding some form of health scaling as it will make the defensive curve much smoother than relying on increasing armour. 20 health is 20 health.)
