Question about armor class

[Axianamos]

My friend bought a piece of "absolute minimum level 22" chainmail for me that was leveled down to level 4. No idea how that's even possible, but that's not the point. The max dex bonus on it is 13, and all together it gives me 25 AC. At level 12 I have a +13 dex modifier, meaning I'm maxed out on this armor, but there's nothing my level that has a better dex bonus aside from cloth armor

So I was looking into cloth armor, I figured with an armored belt or something similar I could achieve a higher AC. I noticed a +5 robe, and a +8 armored belt. I figured it would be a good buy, since the chainmail has nothing on it aside from being high level, and the robe has deathblock, which is starting to be something I'm concerned about. Not that it really matters since I die instantly anyway. Which begs the question as to why I even care about AC to begin with... Again not the point. (I have a few AP into aggro drops and less threat generation to help with that.)

However I noticed that all the +X values on cloth armor are all counted as "armor bonuses" and the armored prefix from bracers/boots/belts are also armor bonuses. Now before I waste my money, my pretty simple question is this. I presume they don't stack. Am I correct in my assumption?

[Chi_Ryu]

However I noticed that all the +X values on cloth armor are all counted as "armor bonuses" and the armored prefix from bracers/boots/belts are also armor bonuses. Now before I waste my money, my pretty simple question is this. I presume they don't stack. Am I correct in my assumption?

You are correct in your assumption, they don't stack. Protection and Natural Armor will stack with an armor bonus, though.

(The "celestial chainmail ML22 with a blue augment slot which miraculously becomes ML2 when disjuncted" is probably not WAI, btw.)

EDIT: Forgot to mention, Celestial Leather armor has a max dex bonus of 18.