I don't think you're getting the rules, Accel. Here's how they work.
A) You can use Enhancement bonus and crit dice of a ki focus in place of a weapon's. No surprises here.
B) You can use a weapon's power and/or properties when attacking with the weapon. Same.
C) You can use the ki focus' powers and properties when attacking with a weapon. Fine.
D) You cannot do B and C at the same time.
That's it. A plays no part in Rule D.
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Twostuck, Homestuck RPG: http://www.gamefaqs.com/boards/8-gamefaqs-contests/62168402