The two Mystagogue mixtapes were NOT mixed by the RZA. They were in fact produced by a DJ/turntablist/producer by the name of Tobe Donohue a.k.a. DJ Casual T from the Animal Crackers crew out of Cincinnati, OH. The Animal Crackers crew were part of the group responsible for Scribble Jam and are affiliated with DJ Mr. Dibbs.
I managed to get in touch with him via e-mail to confirm his work on the two tapes. I informed him of the ripped audio mp3s that are circulating and he will take a look in his archives for the original DAT tapes. Maybe I can persuade him to remaster and re-release the tapes in some form.