Dante himself said that his book had some non literal meanings, stuff hidden between the lines, and that it would take a bunch of read throughs to fully understand it. I don’t know what interview about the book it was but it’s there. I didn’t consider the bones to be part of this but it definitely could be. This is magic and there are probably a million ways to do the same thing but not one of those ways is wrong. Even EA’s systems vary from book to book, and just as he says you will quickly outgrow his structured step by step methods and adapt it to yourself. Even Dante’s book says that you must personalize EVERY ritual in necromancy.
So to sum it all up : Just do whatever works, fuck anyone else’s paradigm.