The setup I was talking about is just common mirroring or transference.
If your charachter needs to separate, control rig to drive the same bones that you would drive in a 3d program is best.
If you are making an armor thing however, it may be best to “switch character” rather than it is to attach the character.
Why?
because movement.
not every type of movement you may have as a walking character may be avaliable while in the armor/stilt.
So then, it is probably easier to create a separate item and replace the characharacter plus rig at runtime into a completely different blueprint set with new controls and new animations.
And yes, I mean frome the human heel to the mecca.
A properly parented bone will work easier than a script.
The distance between the mecca and the foot heel is bound to be fixed anyway, so a bone locked in place between the 2 will server as a hard limit and a way to transfer motion.