I am needing some information on the fundamentals of banishing. The how to perform a banishing and why its done that way. Core elements and perhaps some recommendations for a serious banishing ritual to deal with my battle with an astral parasite/succubus/demon/who knows.

So please keep this thread to banishing methods and best practices so i can devise my own banishing system to rid myself of some probelm spirit(s).

To develop a banishing ritual, first acquire a magical
weapon — a sword, a dagger, a wand, or perhaps a large ring. The
instrument should be something which is impressive to the mind
and should also represent the aspirations of the magician. The
advantages of hand forging one's own instruments, or discovering
them in some strange way, cannot be over-emphasized. The
banishing ritual should contain the following elements as a
minimum.
First, the magician describes a barrier about himself with the
magical weapon. The barrier is also strongly visualized. Three
dimensional figures are preferable. See figure 1 on page 20.
Second, the magician focuses his will on a visualized image:
for example, the image of the magical weapon, or his own imagi-
nary third eye, or perhaps a ball of light inside his own head. A
sound concentration may additionally or alternatively be used.

Third, the barrier is reinforced with power symbols drawn
with the magical weapon. The traditional five-pointed star or
pentagram can be used, or the eight-pointed star of Chaos, or any
other form. Words of power may also be used.
Fourth, the magician aspires to the infinite void by a brief but
determined effort to stop thinking.

Took this straight out of liber Null book. The barrier you visualize easiest is the shape of a pyramid wirh a pentagram at each corner and top

If at all possible take into account the moon phase etc.. this as well as planetary hours will give your work an extra boost. As well as herbs that correspond to banishment. Hope this helps ♡