Been while since I've heard any Schickert but also agree that "Uberfallig" is his best but TBH I think my favorite thing of his is GAM's "Eiszeit" (recorded 1978- 1 year before "Uberfallig"- but not released until 2005). Ever heard that one? If not, ignore the cheesy cover and dive in:
Also, I know this is all krautrock but I don't see any of this stuff as being very similar to Faust at all. Yeah, it's similarly atmospheric and experimental at times but the focus is on layers of technically proficient guitar a la Manuel Gottsching whereas Faust was practically *anti*-technique, especially in the beginning.