There is only one best psychic in the world. Take a look in a mirror: the best psychic is yourself.
Is is said that a wise man learns from the mistakes of others - this is quite true. To be the best in any field the knowledge of others is an invaluable resource. However, objective knowledge and skill are not enough in the psychic realm.
You are the best psychic for yourself (and everybody the best psychic for themselves) because the psychic realm deals mostly with the subjective rather than the objective. The psychic knowledge of others can get you only so far - to truly understand it you have to experience it yourself.
If one person is skilled at something, it doesn't mean he or she is able to transfer that skill to another person. Teaching is a skill of its own. For many things, it doesn't matter if you're not skilled, since there are others who can do them for you. (If the electric wiring in your house is messed up, you call an electrician.) With psychic abilities it's different, since you would have to transfer an internal state or experience and not an external object.
A psychic operates with internal symbology and connects one feeling with another. It is possible to attempt to communicate these feelings to another person, but the gap in communication is usually quite wide and results in many misunderstandings. You have to self-reflect and find out about yourself on your own, because in the end, all that the even most knowledgeable and best psychic can do is help you help yourself.
To become the best psychic, open your heart, open your mind, and stand in your sacred presence without fear.