It’s important to note I did this working in February 2014, around 3 years before BMoA was published, so the system was not in place at that time.
I would imagine that to do the work and enter the current described in BMoA, yes, I have particularly noted @KurtisJoseph’s words and that he did not take the sacrifice lightly: Serpent - #6 by KurtisJoseph.
Gates Of Dozak does not contain any need for the same things, but it is a very different system, and my method had the foundation of, at that time, over 20 years of spirit contact, evocation and soul travel, and also came through one of E.A.'s videos (Evocation of Azi Dahaka) so the entire foundation was different. I remained in that current for far less time as it was finally a gateway to another piece of work I did.
So these are 3 different approaches and mixing and matching is probably not wise given that this is a very powerful, life-altering current.
You would need to really ask Kurtis about his system, I am not going to venture into guesswork, he’s an awesome dude and does often pop onto the forum and reply. 