I didn't expect this kind of Spanish Inquisition.

Mistaking ones preferred occult current for absolute truth is an error I have been encountering more and more as I become involved in the Esoteric community.
I keep seeing people saying "This is wrong!" about very subjective concepts and tools, when saying, "This doesn't mesh very well with this particular school of thought in this particular branch of the western esoteric tradition.”, would be far more accurate.
One of the greatest 'Metatruths' I've ever discovered, regardless of it's original context is, “Nothing is True. Everything is Permitted.”. I take it as a meditation on the nature of the universe, and use it internally as a refutation of the concept of hierarchy. Just as “As above, so below” is not only a statement on how magic functions, but also a statement on the illusionary nature of spiritual hierarchies in general.
I would say that these two ideas should be paired together, and used as a guide when navigating magic, and when dealing with the various entities one encounters in an evocation.

As above, so below.
Nothing is true, everything is permitted.

How can one cast down other peoples spiritual/magical methods when one has encountered these ideas?
One can make an argument on the effectiveness of certain techniques from a personal perspective, but to say something is “wrong” is to make an appeal to some sort of absolute authority. And if you believe there is an absolute authority and that your preferred magical system/current is the One-True™ system ordained by God, you've descended into fundamentalism. And if you've done that, you have to either pile on the cognitive dissonance necessary to ignore the literally thousands of effective indigenous magical systems and syncretic systems, or you have to declare all those systems as “evil” or “demonic”, and sound just like the worst of the rabid priests of orthodoxy.

The real secret of the Mystery Cults

It is my opinion/contention that most, if not all, of the grand secrets of the Mystery Cults of the ancient world and even early Hermeticism (Blasphemy!), were actually ceremonies with entheogens as their primary catalyst. You went through initiations to move through the grades, and were tested on your knowledge, all to prepare you to Touch the cosmic. As anyone with a working knowledge of psychedelics will tell you, tripping for the first time by yourself can have disastrous results. Now imagine if your first trip was after you had learned a strong mythological context, with a pre prepared ceremony r ritual to guide you through it? And you thought listening to Dark side of the moon on mushrooms was amazing. I truly feel like this is the keystone to the mysteries. And I feel it's why most of the Modern Mystery schools all seem so hollow. Yes there is still a great deal for the modern Adept to glean from the Esoteric societies, but it is a faint shadow of true communion/revelation.

Having performed the LRBP using Entheogens, I can tell you with some certainty that it is a wholly/Holy different and powerful experience. I would even go so far as to suggest that the reason High magic in the Hermetic tradition is so concerned with sacred geometries is precisely to instill order in the potential chaos of the entheogenic experience.

Also I would hazard a guess, as I haven't done the work on this myself, that Evoking a spirit to visible manifestation would be more likely successful. Almost as if that was how it was originally intended.

Spirals & Spins

I was thinking about the old "clockwise for invoking, counterclockwise for banishing" canard, an it struck me. If this principle is valid, it means magick energy flows in a spiral. If it flows towards you it follows a clockwise (from your perspective) spin. And if it flows away from you, it flows in a counterclockwise spin.

So the spiral in the image, if we assume it increases in size as it gets closer, would be the approximate shape of the spiral (of course in three dimensions). If so, this could be applied to magical work targeting others. If you wanted to affect someone you would aim it at them and put a counterclockwise spin on it, as it would then be moving from you to them (clockwise from their perspective). It also seems to apply to reiki. Also, if true, could make for some very quick magical defence techniques. This raises some interesting metaphysical questions. 

With the model presented, to draw something to you, you would spin it clockwise on your end. If you look at the LRP (Lesser Ritual of the Pentagram), as you go along the cardinal directions you move in a clockwise direction relative to the ground you stand on, so you are drawing up earth energy

I believe that the idea of Invoking as the 'raising' of energy, and it's association with clockwise motion is a bit of a misunderstanding of the underlying principles o this spiral motion. So even when attempting to cast a 'positive' spell on another person, the motion is often clockwise.

You actually can't 'invoke' anything in to another person as 'invoking' has to do with drawing things in to yourself. The spin is simply the direction you send the energy. Clockwise is inwards (relative to you), counterclockwise is outwards (relative to you). So it's not the type of subtle energy that determines the spin, but where you what it to go.

I think this is where the idea of the quality and the spin got confused, as one normally sends unwanted or 'negative' energy away from oneself, and wanted or 'positive' energy towards oneself. So the associations of positive and negative got confused with clockwise and counterclockwise. This leads to some interesting magical models, for instance, if you want to set up a continuous flow between yourself and a target, you'd want to construct two spirals, one with a clockwise spin and one with a counterclockwise spin.

The classic 'Heart' shape is two golden spirals with opposite spins touching one another.