Not really i worked this out as combination of things from my own practice.
As to the benifits i already said a bit about that, once they are broken down energy is energy, but like in vampiric energy practices you have to be able to remove the toxic aspects of the energy or you risk absorbing the toxic energies.
If your looking for a guide to help with ridding yourself of spritual parasites a regiment of banishing and an uncrossing rituals can help with this.
I have info on both linked in this list along with alots of other things.