Slug's Magic Resistance Mod!

Features:

The mod preforms damage calculations, that depend on the armour an entity (player) is wearing and adjusts the damage value according to the the type of incoming damage. If the damage is a type of Unblockable; calculations will apply. It is natively compatible with armour sets that already resist armour piecing damage (no exterior API's required).

Important Note:

This mod does not change how armour behaves when worn by mobs - they will take unblockable damage as normal (so spells will still be a great way to do PVE - while players will be better protected against mobs which do unblockable damage - I might add a config for this!)