The Mad Raq stringing pattern is at the top of my list of "I wish someone would make that again". I'm reasonably certain it's legal: I believe the "one set of strings" referred to in the rules was aimed at the spaghetti stringing, which had three separate (in the sense of not being woven together) "sets" of string. It doesn't mean "set" in the sense of "coil".
I suspect the USRSA hated Mad Raqs not so much because they were difficult to string but because they so rarely needed it.
There are two rules to success in life:
1. Never tell anyone everything you know.