*IMHO* Uncle Chucky has it down. Even if you minus the radionics/psionic- his magickal knowledge and writing style is hard to beat.
He makes magick make sense, simple, and effective. He pulls no punches. DuQuette also is good, but sometimes I get that 'smug I'm a great OTO leader' from him on his interviews.
If Cosimano wrote 'Enochian How To' books....the 'apocalypse' would have started in the 80's lol