I'm OK with the monk's belt ruling, but I'm used to the Wis bonus being included as it falls under a monk's AC bonus. But I admit it can be overpowered.
I swapped out the belt and a couple of other items for a mithral buckler +5 (0% ASF) and a ring of protection +1, and made a few other minor changes and corrections.
Harin is not optimized as a high level 'face' but could still do a decent job of social interaction (diplomacy +17, bluff +21, sense motive +21).