Awesome defensive ability. Your dex and wisdom bonus will be awesome . this is a real benefit as your dex bonus is not restricted by armor. This makes that 22 dex give you a +6 on top of the 11 bonus of your wisdom. Combine it with items to really give yourself some nice AC. You should be fighting defensively every turn which gives you a +3 bonus to your AC.
Now, if I compare porpentine's one and gave this build the same equipment with the only change that the headband give +2 to charisma instead of intelligence, I would think it would compare. The difference is one Dexterity point, and 3 additions to the monk AC.
Archbury will be fighting defensively so he gains +3 to his AC. So he misses out on one point of AC that One had. So his total AC would be 52 and 39 touch.
But that isn't your real defense here. Your real defense isn't as obvious and it comes in the form of crane wing, deflect arrows, and improved evasion. Uncanny dodge helps too by removing the ability to flat-footed.
As long as you use fighting defensively and let one hand off your bow, you are immune to a melee class from charging you or moving up more than a 5 foot step to attack you. If two of them do it, you won't avoid the second one, but you save yourself from the first. This is quite helpful as it means you won't have to rely on AC if you stay out of range. Normally a fighter would take the hit if a fighter decided to charge them.
Deflect arrows protects you from vital strike from another archer, any singular attack, and prevents manyshot from working. You block automatically a ranged character's highest attack and if they are using manyshot, their two highest attacks. That will only help mildly against another zen archer, but will protect you from the fighter with manyshot. Any further attacks will be at least 5 BAB less, allowing your defenses to shine. This does not apply to a zen archer flurrying however. So it will only protect you from one attack from a zen archer.
Evasion and improved evasion helps you out as well. Any attack that allows you a save for half damage will only deal half damage if you fail, but if you succeed you take no damage. You should have pretty nice reflex saves, so you won't have a problem making them, protecting you from damage further.
Your CMD will not be as good as One and your saves aren't going to be quite as high as one's. Your fortitude will suffer with only +13. That is your main weak point. Something that can target that will be your downfall.
Your reflex should be fairly high, I don't know exactly what to use to calculate it. I would think that it would be only one less than One's. Which would make it a +26. however that is probably wrong. Your will should be just as high as One's though.
Overall you won't be as resistant with saves as One. But you will still have some pretty great ones.
You also lack the spell resistance, which is a good thing and a bad thing. When you are by yourself, spell resistance is good to have. When you are in a group, trying to overcome it can be annoying to say the least
