I share with you some interest over this matter, which I would define as understanding Jung from the MBT point of view. I am a Brazilian psychiatrist, but unfortunately I have only a little knowledge of Jung´s work, so I don´t know if I can be of much help to you.
As far as I know, generally speaking, Jung could see a bigger picture of reality than Freud could, even though Freud´s work is also of great importance, at least to my own personal understanding of the human being.
You probably know the term "synchronicity" which was coined by Jung (see his book, Synchronicity: An Acausal Connecting Principle). Only very open-minded people could perceive and think seriously about such things at that time. From what I know Jung was beginning to understand more broadly our reality, but at the same time there was still an important amount of beliefs in his way, so his understanding was still confusing about some things.
I wish I was able to explain to you more about how correct it is to say that "the collective unconscious is the LCS", but I think I am kind of in the same boat as you on that matter. I would take a guess, however, and say that archetypes actually refer to specific data shared by different IUOCs, that can be also found as data somewhere else on the LCS, perhaps on the Past Databases.
Lastly, I´ll add that I don´t find what I read on wikipedia to be accurate at all, some times. Some of Freud´s ideas for example.
Please share what you are in the future capable of understanding about this matter.