I would disagree with equating the mystic experience with the illusions projected by the mind. While, in having various mystic experiences we, because of our plentifully conditioned minds, place overlays on the experience, the mystic experience is not exclusively conditioned.
How do you determine whether mystical experiences are conditioned or illusory?
Then it is still just a perception of ultimate reality and something to be let go of. I guess I would think of that as part of the mystic's path. There is a lot of delusion to work through and plenty of pitfalls to avoid. That doesn't mean that the mystic is inherently a delusional person. That delusion exists in all paths in different forms. Sticking to philosophy and lifestyle practice has room for pitfalls as well.
So all perceptions of ultimate reality should be let go of? What is there to perceive without sensory-perception? Isn't it delusional to deny one's own sensory-perception? from what basis do you pass judgment upon the nature of reality?
This sort of contradicts your own explanation of mysticism. If one is intentionally seeking union with a particular concept of the own creation, then they are not seeking union with ultimate reality. If one is accidentally identifying reality with their concept, they have fallen into one of the aforementioned pitfalls and are still working on the path.
Perhaps you could explain mysticism better?
Ultimate reality is a thought-construct. Whoa, deja vu!