Would the most effective way to enhance Soul Matrix Healing be to add the thought plane and akashic records to the column in the Soul Matrix Healing that includes cultural beliefs, ancestral beliefs and collective unconscious (both human and extraterrestrial)?

These new aspects can be included in the list of items in the matrix itself, but a separate request is also quite useful. That way, in a sense, you are coming at the issue of the interplay from both ends—from the end of the outside influencers impinging on the client through the respective phenomena, whether akashic records or collective unconscious and their individual thought planes, and then reworking the problem yet again from the perspective of what the client has created in reaching out to those phenomena and adding or extracting negativity that will cause harm to them as a consequence. Doing both will give you benefits greater than the sum of the individual efforts, as we indicated. The most effective way to add the full array of possibilities is to both add them to the Soul Matrix, and have a separate step as well to make a request for direct healing of their thought plane, their akashic records, and their involvement with the collective unconscious.