SUPERIOR EXPERTISE [Combat]

    You have mastered the art of defense in combat.
Prerequisite: Expertise, Int 13+, BAB +6.
Benefit: When you use the Expertise feat to improve your
Armor Class, the number you subtract from your attack and
add to your AC can be any number that does not exceed your
base attack bonus.  (Without this feat, the number can be no
greater than +5.)