This build is designed to be extremely tough: saving throws in the 30s with epic resilience, over 500 hp, damage resistance, can't be sneak attacked, and very high AC in rather average items . The keys to the AC are divine shield, ac bonus from RDD, and the AC bonus from DD. Give him mythril full plate, natural armor +5 necklace, bracers of armor 10, ring of protection +5, and boots of the sun soul +5 (use magic device), nymph cloak +8, heavy shield +5. All of these bonuses do stack, not saying if they should or not just that they do in-game. It looks like I should be able to get about 81 ac with Betrayer gear. (Permanent no buff ac is about 70, though divine shield lasts for over 10 rounds a pop and there are 11 uses of it per day.)