Opinions on Jareth Tempests New books

What are peoples experiences with the pathworking method within books such as raziels paths of power?

I find it hard to believe this method is truly legitimate as usually the 72 shem angel power must be accessed from a sigil and then called 11 days in a row.

Some people are even accusing the author of plagiarism as it uses the exact same ritual process as Lucifer and the hidden demons by Theodore Rose.