Defensive Style, Unarmored (Combat)Modifier
You are skilled at dodging blow with no armor and relies on speed in order to keep yourself alive
Benefit: You gain no proficiency with any armor or shields but when unarmored and unencumbered, you adds your Wisdom bonus (if any) to your AC and CMD.
In addition, you gains a +1 bonus to AC and CMD at 4th level. This bonus increases by 1 for every four levels thereafter. This is a Insight Bonus.
These bonuses to AC apply even against touch attacks or when you are flat-footed. You loses these bonuses when you are immobilized or helpless, when you wears any armor, when you carries a shield, or when you carries a medium or heavy load.
Essentia: Your Insight Bonus increase by +1 / Essentia
and all attack from your bonus Full Attack gain a +1 Circonstance Bonus / Essentia to Hit (+2 / Essentia if used to offset a Gambit penalty)
Special: For Fighter, Bard and Magus the Bonus come from Intelligence instead of Wisdom
Special: For Monk the AC Bonus is equal to 1/2 Monk level + Wisdom (instead of Wis + 1/4 HD)