In a sense, this would seem to be a further amplification. In actuality, all souls continue to exist who have been involved in the human enterprise through all of time. They are either incarnated or in the light, or elsewhere on various missions and duties, but are reachable with respect to a request for adding their intention to the broad healing outreach on behalf of humanity. So it matters not what time domain you go to, once those souls have been asked to participate, it adds nothing further to reach the same soul extension in another iteration, another incarnation on a differing timeline. It will add no greater energy than the soul itself can provide. Keep in mind that the soul resides in the higher astral plane and is separate from all incarnation activities regardless of where and when these might be. So those soul extensions taking part in lives on other timelines are only a small part of the soul to begin with. Once the soul residing in the light is asked to join with its intention for human betterment, and the betterment of all other beings affected by the interloper problem in earth plane, you have all you need to maximize utilizing their energies.