Damage Reduction

Ignoring and reducing Armour
There are several kinds of damage that ignores armour in most circumstances As well as several opportunities to reduce the effects of armour
 * - Physical damage from a critical hit
 * - Sneak Attacks
 * -  Arcane or Pure damage from a divine source
 * -  Environmental damage that is considered ‘overwhelming’* Ie – cold damage from a blizzard ignores ‘arcane’ resistance, as does  heat damage from standing in an inferno or being literally on fire.
 * Swarm Damage
 * - Bodkin Arrows: Halve enemy armour
 * - Special Piercing Blades: Halve enemy armour

* Enchantments to add resistance to specific elements (Ie, an enchantment to resist frost) are applied even to overwhelming environmental damage, but base arcane resistance is not.