Prerequisites: Unarmored Specialist, evasion class feature.
Improved Unarmored Specialist (Combat)
Benefit: As long as you do not have any armor bonus to AC (such as from wearing armor, or from the spell mage armor), double your Dexterity bonus for the purposes of your AC (for example, a character with a Dexterity score of 15 would have a +4 Dexterity bonus to AC, because the normal bonus is +2, and doubled it becomes +4). Anything that would cause you to be denied your Dexterity bonus to AC still causes you to lose the entire bonus.
Normal: Normally you add your Dexterity bonus, rather than twice your Dexterity bonus, to AC.
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Now, the above feat is a third-party feat, so allowing this is up to the individual GM, but I wanted to know how the feat actually extends to the AC of a character. In Pathfinder, there's regular AC, Touch-AC, and flat-footed AC, where regular AC applies to all weapon attacks, Touch-AC is normally against spells and/or incorporeal attacks, and flat-footed AC normally occurs from things such as sneak-attacks or when someone has been grappled.
My question is that the above feat states that you doubly your Dex modifier for determining your AC, but it doesn't state whether this bonus applies only to your regular AC, or if it extends to Touch AC as well. I know you lose your Dex modifier when you're caught flat-footed, so I know this feat wouldn't help in the case of a sneak-attack.
For example, there's a Magus Arcana that allows you to add your INT modifier to your Touch-AC, rather than your full AC. However, there's a later arcana that allows your INT modifier to apply to your full AC.
Since the above feat doesn't state that the bonus to your AC applies to Touch AC, should I assume that it only applies to standard AC, rather than to both my regular AC and touch AC?
All other modifiers, such as your size modifier, Dexterity modifier, and deflection bonus (if any) apply normally.The feat's description says it's a dexterity bonus, so yes, it does apply to touch AC.
Alrighty, thanks! I'll be running this as an okay feat for my players in a coming campaign, so I just need to find some challenges that take advantage of flat-footed AC, or simply sending a bunch of astral-jumping spiders at em. Can't wait!