New feats

[Sock Puppet]

Armiger

You know how to use your armour to mitigate damage.

Prerequisite: Base attack bonus +4
Benefit: Your armour provides damage resistance against piercing, slashing, and bludgeoning damage, up to a limit of your BAB or half (your armour's armour bonus (plus enhancement bonus, if any)) rounded down, whichever is lower.

Improved Armiger

You know how to use your armour to mitigate damage.

Prerequisite: Base attack bonus +9, Armiger
Benefit: Your armour provides damage resistance against piercing, slashing, and bludgeoning damage, up to a limit of your BAB or your armour's armour bonus (plus enhancement bonus, if any), whichever is lower.

Greater Armiger

You know how to use your armour to mitigate damage.

Prerequisite: Base attack bonus +16, Armiger, Improved Armiger
Benefit: Your armour provides damage resistance against piercing, slashing, and bludgeoning damage, up to a limit of your BAB or two times (your armour's armour bonus (plus enhancement bonus, if any)), whichever is lower.

Battle Rush

Prerequisites: Base attack bonus +3, Constitution 13
Benefit: A number of times per day equal to your Constitution bonus, you an enter a battle rush. This rush lasts for ten minutes. While in a battle rush, half of any damage you inflict on an enemy in melee gets returned to you as temporary hit points. These temporary hit points are lost first when you take damage, and automatically vanish at the end of the battle rush period.
Note: For the purposes of this feat, an enemy is only counted if they are aware of your presence, and have a chance of causing hit point damage to you in that round. It does not count if you hypothetically leave yourself open to attack (only your actual actions that round count), but it does count if they can do so in a way that puts them at greater risk than might otherwise be considered safe.

Battle Rush needs revision due to being unbalanced.