Don't skip "Faust IV"
Their best album and just as accessible as "So Far" if not more so. I agree with your assessment of the debut- appreciate how groundbreaking and radical it was for the time but it's not a very enjoyable listening experience. "The Faust Tapes" manages to be just as experimental and even more fragmented but is arguably far more engaging.
Anyway here's a couple of highlights from "IV" (the coda on the first song always reminded me of The Mothers of Invention so it gets bonus points for that):