For the Soul Matrix Healing, is it worth having a column for extragalactic and interdimensional intruders as well, perhaps combined in one, or do these need to be segregated? Can all be combined together?

Indeed they need to be included as a potential contributor to the group of perpetrators, and it is perfectly fine to have but a single column and then list the members as you do for the other groups in some cases, like under the archetypes. So the various categories can be explicitly stated. You, in fact, have included the effects of the alien, extragalactic, and interdimensional intruders, to be included in the Soul Matrix Healing but this does not explicitly put their effects under the context of the various time domain influences. So this explicit labeling and creation of a map of the factors and their place in the matrix is the most explicit and effective way to request what is truly wanted here—all influences across all of time.