You're not using your TK for dmg, You're using it for TH. Same argument. When you melee with a Joy/mkris, TP gain is the goal, but TP damage is still a factor. Same as using TK.
A better suggestion would be for a dagger set that gives +1 on each or +1/+2 when used as a set. Alternatively to ask for all low level weapons to be upgraded. The problem with the 2nd would be it would involve either too much random shit to be worthwhile (first augment system) or potentially a lot of programming.
