W A R F O R G E D ! ! !
If you want to do good damage as a monk you need size increases!
I had a build that went something like this:
Worforged
Monk
Wizard
Enlightened Fist
Warshaper
Important notes:
Monk 11 (from monk and enlightended fist)
Superior unarmed strike (damage as monk +4 levels. Tome of battle)
Monks belt (+5 levels. Definately increases beyond HD.)
=2d10 base damage.
Improved natural attack +1 size
Battle fists +1 size
Greater mighty wallop spell (1hr/level. +1 size/4 caster levels)
Warshaper +1 size
Enlarge person +1 size
By around level 12 you have 7 size increases.
Base damage:2d10>4d8>6d8>9d8>12d8>16d8>24d8>28d8 base damage. (126 average)
And you can use touch spells when you full attack. and basic spells like Mage armour, shield & mirror image so you can actually survive.
Imagine a little old man walking along, getting angry and putting his fist through a castle wall!