Dashsora, i set the strength of Joint Object 3, to 999999 as you said, and Object 4 and Joint Object 3 have 45, -45, 0 as their rotations.
If i'm correct, you're including the dagger handle (Object 1) that is underneath the foot, as a object that has to have the same rotation as Object 4. If that's the case, i'm wondering how the rotations are to be set, as Object 1 is also connected to Object 3.

Also. If I do what your example suggests, then I will have to use more objects to stop the weapon sliding off the side of the foot. I want to create one for each foot, which means I can only use 4/16 objects per foot, and one is the dagger blade that goes on the handle underneath the foot. This means that the other two objects that is on the top of the foot, has to be angled so it blocks 2 and a half of the sides of the foot.
Object 3 Blocks the right, the top right, and the front side (via blocking the front of the ankle joint).
Object 4 blocks the back, the left, and the top left side.
Object 3 and 4, accumulatively, block the top side of the foot (top right side [\] + [/] top left side = top side [/-\)
Object 1 (the handle of the dagger part) blocks the bottom, and prevents the foot from colliding immediately with the blade of the dagger.
I cannot add more objects, or I would only be able to have 2 of the weapons (1 per person).