What about turning ki into something akin to bardic performance and rage? Instead of having ki function as a default state, you could have it consumed each round. It would add wisdom to damage and attack instead of strength...
The ki strike abilities could be functional only when ki points were consumed.... I think that might work. Ki strike abilities could work like rage powers.
I still think monks would need things like enhancement bonuses to hit and damage to gain parity with standard melee classes, but the above would probably work. maybe I'll post a build in your thread dabbler.
Dotting for when I have more time.