Sounds like you'd be best off with a scion of Morpheus, or something of the same type.
Powerset wise I'd go for something like this:
Emotional Vampire [-1] (Dreams)
Feeding Dependency [+0] (Dreams)
Incite Emotion [-1] (Lethargy)
Sponsored Magic [-4] (Oneiromancy)
That's a pretty basic set up with some room for improvement through the Incite Effect upgrade tree. Feeding Dependency is in there because it's a RAW power, but I think the most preferred method of dealing with it on these boards is through compels rather than using the given mechanics.
ONEIROMANCY [-5]
Description: You have mastered the powers of Sleep and Dreams. Dreams are far more powerful than most believe; Dreams and Reality are like a wyrm biting its own tail - they both tell each other what they are, all the time.
Sponsor: Psychomancers, nightmare Changelings, and denizens of Dream sometimes have self-sponsored Oneiromancy. When Oneiromancy has an external sponsor, it's usually an ancient god of sleep or the ever-moving moon.
Agenda: Oneiromancy wants to put people to sleep, give them dreams or nightmares, and eat their dreams. Oneiromancers tend to be cold and proud, inclined to punish those who slight them.
Evocation: Oneiromancy evocations involve shadows, sand, reflections, perception, dreams, dreamfire, sleep, and the manipulation of oneiroplasm (psychically charged ectoplasm) to create objects.
Thaumaturgy: Oneiromancy rituals involve putting people to sleep, sending messages in dreams, manipulating perception, and making things from dreams real.
Evothaum: You gain the ability to use dream-related psychomancy, summoning, and conjuration with Evocation’s speed and methods.
Extra Benefits: Oneiromancy grants the Demesne power for the Dreaming. It also allows its user to use Lore in place of Empathy for the Reading People and Social Defense trappings of that skill.
Perhaps a re-write of Oneiromancy too?
ONEIROMANCY [-4]
Description: You have been gifted with power over dreams and those who have them.
Sponsor: Morpheus, Hypnos, Nodens, the Sandman; the gods of sleep are many and varied. One of these has given you the power of Oneiromancy.
Agenda: Dreams and nightmares both fall under the purview of this god. Usually fair, if not benevolent, the God of Dreams is concerned with stories most of all. Oneiromancers tend to be more otherworldly than most practitioners, their powers giving them an insight into the surreal.
Evocation: Oneiromancy acts like Spirit for the purposes of Evocation, being primarily used for veils and illusions.
Thaumaturgy: Oneiromancers are capable of Psychomancy, Divination and Photomantic rituals in order to view, interpret and bring dreams into reality.
Evothaum: Oneiromancy allows you to use Psychomancy and Photomancy with the speed and methods of Evocation.
Extra Benefits: The surreal and illogical nature of dreams gives you greater insight into the workings of the Nevernever, the Land of Dreams. Gain +1 to any Lore rolls made to navigate the Nevernever.