This is my take on describing each rank in a similar fashion to what you've tried to do. Take this in its entirety or alter it to your liking.

Mindless

An individual who is either unaware of what transpires in their dreams or only partially aware. They may not realise they even dream at all. They are simply a helpless passenger, unable to act or have any impact on their Dreamworld. They mindlessly watch their dreams play out before them while they sleep, only to lose most or all memory of what occurred upon waking.

Observer

The first stepping stone in becoming a God of the Dreamworld - an individual who has earned this rank is very much aware of their own Dreamworld and has began to take note of what they experience. They will have started a dream journal and began recording dreams that vary from vague fragments to more detailed entries - perhaps even multiple entries per night. They may have even tapped into the mysterious phenomenon known as lucid dreaming and began exploring the dreamscape to a lesser degree, with limited control.

Wanderer

The second stepping stone in becoming a God of the Dreamworld - an individual who has earned this rank has become quite proficient at recording their dreams and can easily recall a whole dream with considerable depth. They no longer feel like someone who is observing and more like somebody who is engaging. They have become familiar with patterns and symbols that may occur during their dreams, and use these signs to help them become aware of their surroundings while dreaming, resulting in the ability to assume control and explore the dreamscape to a greater degree than an Observer. They will make discoveries unique to them and use these findings to further improve their abilities.

Disciplined

The third stepping stone in becoming a God of the Dreamworld - an individual who has earned this rank not only has excellent dream recall, but also has an advanced understanding of their dreams. Lucid dreaming is their prime focus and one that is yielding abundant results. They have become well versed with technique(s) that help them attain lucidity, as well as prolong the time they can consciously remain within a dream. They are quite the skilled dreamer, but know that there is still a bottomless pit of knowledge that awaits them, eager to be explored. Their dream control has also moderately improved, enabling them to do things they never thought possible. They have seen many things, been on many a journey, and come so far since their first steps into the dimension of the surreal.

Adept

The fourth stepping stone in becoming a God of the Dreamworld - an individual who has earned this rank has passed a point of no return. Life will never be the same for them, as they have invested a lot of time and effort into becoming the extremely skilled and disciplined lucid dreamer that are they. They have a vast knowledge of both their Dreamworld and their inner-self, but are always adding to their wealth of experience as there is still much to explore.

Master

The fifth stepping stone in becoming a God of the Dreamworld. An individual who has earned this rank has laid waste to all trials and tribulations that were laid before them and ascended to a higher state of mind. They have mastered the art of lucid dreaming and have a huge array of stories to be told. They can control virtually every aspect of their dreams and become lucid with their willpower alone. They have learned to distinguish between real and false realities by how it feels, and the Dreamworld bows to their absolute authority.

Sage

The sixth stepping stone in becoming a God of the Dreamworld - an individual who has earned this rank has surpassed the title of Master and are in a league of their own. Their eyes have been opened to the truth - that dreams are much more than meets the eye. The conjoining of waking reality and sleeping reality has enabled them to become One with themselves and their prime goal is that of spiritual ascension. They have realised that this life and all they have achieved is but the first stage in their development. They are destined for greatness and they are well aware of this fact - they use their dreams as a source of empowerment, to contribute to their advancements in the waking world, as the Dreamworld is limitless in potential and can be used as a training ground for real life scenarios.

Godly

The final stepping stone and ultimate achievement - an individual who has earned this rank has surpassed mortal limitations. They have perfected every aspect possible in relation to dreaming and become the God of their Dreamworld. Not much is known about those who have reached this level of greatness, but legends say that they have tapped into parts of the brain that are normally inaccessible and can exist simultaneously within our world and higher dimensions. Some also say they can enter a dream even while awake. Nobody really knows.