I've been thinking of doing a Factotum/Iajitsu Master build myself, putting everything into Charisma and Int with some dexterity using the Gnomish Quickrazor.

Charisma, Int, and Dex to Initiative. Int and Dex to AC, (probably some way to add cha as well). Easy to set up for the max skill check with factotum, so 9x charisma to damage. Maybe use Slippers of Battledancing to get Cha to attack as well? (Use Factotum to gain an extra action to get the movement in)

Use Factotum spells to get grease to make non-balancer's flat footed. Probably some other methods as well.