As Elison refs… but also, the Gatekeeper Rite is creating a coordinated affect (all four being brouht in, to create a specific affect, for that rite… if it was for a diff affect, the same 4 may have been in diff-corners… and if a DifferentFour were involved (ie B. plus 3 other Entities)= the combo would be a different result… still could be shaped by which “corner” B was attrib’d to.
So could be different “how to call” stand-alone (as in EE)… which could be in any dir. (part of the subj synth and prelim contact prior to Evoking, one should have received fdbk…
part of that Comm would be getting a feel, and confirm/comment from the Entity, prior to locking it in…
as in Bkof A, that is being done setting up the material of the bk, not as in how-to, but the how-to is what resulted… if following the Gatekeeper Rite, one should have the other prereqs mentioned (?) have a person ready to be possessed-channel?
and Evoking a single, prior to evoking multiple (per EE) and as EA commented in forum posts, the Gatekeepers being called creates a ritual-space charged to a degree one should do only after being ready to jump ft first in to change… thus perhaps based upon prior evoking each individually))
but per your post, evocation isn’t specifically mentioned, so perhaps cardinal-attrib for a diff reason? if trying to match a GoldenDawn style list of catagories X goes with which type… that is a subjsynth that could be developed (my exper, as mentioned in my above, is a bit different so might not be as useful for what you are trying to do, as to me generalizing into groups like that seems to only allow surface-contact). luck