Hi, basically an armature have to copy the frame to the other armature.
but in a dynamic contest as fight, and in the middleway there the box collision
but the obj instead should still in the same position and probably same orientation
i have thinked to parent a box to another , or is better use some hook-object?
How you get both objects to the right position does not matter. I usually use a combination of motion, steering and trackto.
Whhen the have the ccorrect position and orientation relative to eachother they can play their according actions.
A typical sequence would be:
Going to required positions
Turning to required direction
Playing according actions.
You might want to ask Emkey. He used this technique in his project. Example opening a chest (armature driven) with a character ( armature driven too).