Yes, no, it depends. I think an underlying question is how one feels and assumes the several parts of oneself and of macrocosm during those "whole operation" or "individual sessions" and how they combine in a specific case. Also a matter of intention. So an external practice can be whatever in actuality. If you banish from the point of vue of Nuit, who banishes who? The more one advances, the more the meaning of any practice can be very different in many ways. Of course it doesnt change the basic purpose of something(for example, a LBRP is still an LBRP)but there are other layers whose combination can make its use and experience different.
And yes it depends on HGA a lot for the core part but dont underestimate also the role of Nuit(an element of it being the current aeon and respective karma/incarnations, particularities of now)and of magical personna(or true will, and its current potential of manifestation). The balance of these make an individual answer.
Also, at good level one may be able to activate or desactivate at will any part of the whole of a technique or ritual or combination, at least to the extent such thing might be useful for the purpose mentioned here. So such questions may be not significant. The intellect may not need to engage in such thing except for the sake of teaching to less advanced practicionner. Personnal answer comes on automatic level in form of direct vision. To help the increase of those one may practice the tarot and the kabalah and also magick and meditation so the combination of elements from different perspectives is more and more in the sphere of sensation and then in any one of those, one can adjust their combination in terms of manifestation.
And no, if i had to answer a short"yes or no", of course LBRP can only do good and certainly not "banish hga". As a general rule for all basic practices, the more the better. From there precise but the basics tend to be always good to keep as a regular routine. Unless you are sure it is not so in your case. But if in doubt, stick to what most masters say and at least you may not go too wrong.