There is nothing that is the "best" per se. Someone like me can experience absolutely nothing in terms of spiritual presence even with the full setup of the Ars Goetia / other grimoires. Meanwhile someone with nothing more than a sigil, an enn, and an intention can experience physical manifestation if they have strong enough senses or abilities. One thing that you have not mentioned is what you use to qualify an evocation as being the "best". Do you mean the best for manifestation of the spirit? Or do you mean the best for results? Or even, do you mean the safest evocation method? We need some information to work with in order to answer this question.
I will assume a hybrid of all these different thoughts and qualifications for when I answer this. If you want an effective evocation method, you need one that is safe, will contact the right spirit, and ensure the right balance of respect + authority. The thing that we have to remember about evocation is that it is simply a process to call a spirit to you and your space; this is all it is in the end and you do not need to define it as anything more fancy than that. So let's take a look at the 3 factors I highlighted:
1. Safety - Not every spirit you call is going to be safe. If you call an Enochian angel, a Goetic demon, or even a Jinn, you will accept the possibility that whatever you are calling comes with risks. Safety means that you have something built into the evocation method that ensures the spirit will carry out what you ask of it in a straightforward non-tricky way and will not go outside the boundaries of your request and touch other parts of your life. A proper safety mechanism will hold back the spirit, enforce a boundary, and ensure that the manifestation of results is smooth without too much noise. In these cases, amazing protective measures can include stuff like the Shem angels being used to balance out Goetic spirits or calling certain spirits with the authority of other spirits (e.g. Demon kings giving you permission to call their subordinates). Other traditional safety measures include the triangle, the lamen, and the circle, which are all valid as well and serve to amplify authority and protect your boundaries. However, in my experience, the circle and the lamen are not super necessary for an evocation method.
Having a safety measure like a protective spirit or using hierarchy is pretty powerful by itself. The thing is that you have to design the protective method based on the type of spirit you evoke. An Enochian angel requires that you use the equipment of the enochian system properly (e.g. the PELE ring, the table, etc). The Dr. Rudd method of using Shem angels to balance out the presence of the demon and to guide its power intelligently is another powerful example. For Jinn, you would rely on the authority of higher ranking Jinn (e.g. the 4 elders, the 7 Jinn Kings) to enable you to have authority over the lower ranking Jinn. You should match the tradition with the spirit. You would not use the LBRP to banish a spirit from the African Tribal Traditions and similarly you would not go to a witch doctor to banish a Jinn. These are the things you should consider for safety.
2. Calling the right spirit - There is a reason occultists advise heavily against using a Ouija board to communicate with spirits by itself. When you call something to come to you, you need to call the right thing. Sometimes, a name by itself is not enough to call the correct spirit. In the Ouija board example, if you call a specific name, a trickster spirit can come in its place and pretend to be the spirit you want to contact. This can lead to various effects from annoying to dangerous depending on what answers your call. Evocation theory makes a huge deal on using the correct measures, correspondences, and conjurations in order to call the correct spirit. Take an example of "Demons of Magick" from GoM, which uses the evocation keys that are specific to each demon. These evocation keys were channeled in tune for each different Goetic spirit and thus when used, are more likely to call the correct spirit because you used something that likely corresponds to it specifically. Of course, there is no guarantee that the evocation keys are 100% objectively correct for this, but it is better than having nothing at all. Other times, in ceremonial magick evocations, we will use planetary and / or, elemental correspondences in order to key in on the correct spirit. These correspondences can be using the correct metal in the lamen, using a correct planetary incense, and calling the spirit in the correct planetary day + hour. This is also a common approach to calling the correct spirit.
In systems such as Jinn magick, you will even find the use of a hierarchy of names to call the correct spirit over. A particular Jinn in a specific tribe will be ruled by higher ranking Jinn and a lot of conjurations would work through the correct set of names in order to call the spirit. The order of names used in the conjuration by itself can be very specific to a particular Jinn and this pattern can also be seen in certain demonic systems of magick such as the Grimorium Verum. Of course, the most famous way to call the correct spirit is to have its sigil. Either your own personal sigil obtained after extended relationship with the spirit or a sigil found in a grimoire will do. But I think this point is quite obvious so it is not all that important to go into detail on this. Another very popular example in modern grimoires is pathworking. In books like "Lucifer and the Hidden Demons", specific pathworkings are used to ensure that you are able to reach the correct spirit and these are channeled to be unique to each spirit / entity. You may also use these pathworkings ways to contact spirits in a unique way in order to call the correct ones in your evocation. But in any case, your method of evocation must allow for a way to call the correct spirit. Once again, matching the method with the tradition can help and this requires research on your part.
3. Authority and Respect - Take a look at conjurations from medieval grimoires and you will see that they all are maximum on commanding the spirits and quite minimal on respecting the spirit. I take the view that spirits are not human intelligences and so require treatment that is beyond human, but respect is a minimum baseline that you should always use regardless of spirit or human. On the other side of this argument, you will also see supplication and worship through traditions like demonolatry and deity worship where the ultimate level of respect is given, but with minimal authority. In my eyes, absolute command with no respect is the worst path you can take while supplication / worship can still be useful in many cases with the correct type of spirit / deity. But for evocation in general, maintaining a healthy level of authority within your interaction with a spirit is a healthy way to go about things. For info on this, feel free to take a look at "Demons of Magick" and see the author says on this; I think this is a very good view to take.
My own personal view is to treat the spirit as a respected equal while keeping your own boundaries reinforced. I do not see a problem with using conjurations with divine / angelic names to enforce authority or using protective measures to keep the boundaries maintained. But I do draw a line at threatening the spirit, cursing it if it does not obey / show up, or using coercive methods. In cases where it is appropriate, I am also open to using offerings and other measures to ensure that it is welcomed into a good atmosphere and that it is paid for its work. You would not have someone perform a service for you without paying them for quality work and saying thank you. The same analogy is true for how you treat the spirit. Your method of evocation, from your conjurations to the protective methods you use, should be following in line with this. The method of evocation should endow you with protection and authority to call the spirit without threatening or coercing. Your method of evocation should also include offerings, as appropriate with the spirit's tradition, in order to say thank you and use respectful language and gestures. If you do this, you will find your results will be far more successful than using the fire and brimstone approach while still ensure you are protected. And note that constraint is not equal to coercion. Constraint when done properly is also restraint, both from your side and the spirit's side. Keep note of this when designing your evocation method.
These are my conceptual keys on what creates a good evocation method. As you see, across traditions, there is not always a one-size-fits-all approach. There is no universal method that can work for every type of spirit, but there are common principles that you can use to build evocation methods that will be effective and safe for you. Building a good method requires study of the spirit, the tradition it comes from, and related concepts in order to truly be effective. A good general book to read could be the "practice of magical evocation" by Franz Bardon, to understand the concepts used in western evocation. There is a lot of good info there, but studying the different ways of calling spirits across different traditions and cultures will give you a lot to work with. As you see, there is not one correct way of calling a spirit to you and there are many different possibilities. I hope these concepts and keys help you.
