I cannot overemphasize the importance of dealing with 4-D shadow-consciousness in healing ourselves. Psychology cannot begin to address the deepest level on which we have things that can be and need to be healed if we are to function as the healthiest humans possible, whatever stage of development we are in, but especially at the more mature stages.
Therefore, the "astral-plane" healing modalities listed above are far from trivial; I do not "dismiss" anything just because it is mainly or only fourth-dimensional. Trans-personal psychological healing modalities and many of the activities and approaches listed above, are the ONLY ways to approach full healing of our fourth-dimensional illusions/shadows. They are absolutely necessary and crucially important, and need to be utilized fully -- and very carefully, because of their extra potential for introducing shall we say super-human malevolence into our lives. They also are the ONLY ways of introducing super-human benevolence, too, and IMO the ONLY ways to heal certain shadow stuff which ordinary psychology cannot begin to address.
Lots of times we believe we have "healed" something via medical methods, or via psychological methods, but unless we have healed the astral-plane aspect of whatever the condition or problem was, we are not fully healed, and it will just manifest again in our experience, perhaps in some other way. Complete healing of anything, requires healing every level and aspect of it. So in the concept of "holistic," I would add, the inclusion of our astral-plane selves, including the feelings and beliefs held by that aspect/level of our full multi-dimensional Selves.