Well you could take a look at the Pathfinder monk for starters.
Me? I'd give it full BAB for starters. Grant it proficiency in all martial weapons, and allow him to use them as monk weapons. Give it proper Slow Fall as the spell instead of the gimped version it has now. Make the 1/day abilities like Dimension Door and 1/week Quivering Palm usable a bit more often - perhaps base their uses off of the monk's Wisdom modifier. Allow him to raise or lower his shields, er, Spell Resistance, as a free action. Replace the poison immunity with something useful - another bonus feat might be good.