Is there any combination of races, classes, items, or feats that allows you to add your Wisdom bonus to AC, without restricting the armor that you wear?
Several classes offer Wisdom to AC while unarmored, and one (swordsage) allows Wisdom to AC while wearing light armor.
It is acceptable for this Wisdom to AC to replace the typical Dexterity to AC, as for example the deepwarden does with Constitution to AC. In this case, however, it cannot explicitly state that the Wisdom to AC is limited by the maximum Dexterity of the armor.
The bonus must count for touch AC; obviously it’s preferable to count for flat-footed as well, but it is acceptable if it does not (note this however).
The bonus must count against all opponents and operate at all times (barring things like flat-footed, bound, helpless, or unconscious); features that allow you to apply Wisdom to AC against a particular opponent, or options that have limited durations or limited uses are not welcome.