This is an easy method for Individual hairs, or other meshes attach to any area that has multiple joint influences.

With right click and copy over the mouse position, the user is able to copy all the weight influences from many joints then then select another object's verts, either partially or fully and paste those influences to the selection.

It would be very helpful in weight painting mode for the user to also be able to move verts/meshes into position rather than jumping from one editor to another having to open and close each window all the time.