Seems fun and interesting.
I think you could probably do something more interesting with the higher levels on Spirit Summons and Spirit Mastery. Even if you just filled in all of those blanks on Spirit Summons with Summon Spirit I, Summon Spirit II, Summon Spirit III, etc, it would be more clear about the level of the spell that is being cast. But for example there could also be spells for controlling spirits on Spirit Summons, or at least influencing their moods. Some other useful effects might be determining that mood, determining a spirit's type and/or power level, repelling a spirit (as a lower level step towards banishment), etc.
On Spirit Trances, some of the information spells are potentially quite potent. I might add some limitations, e.g. for Nature's Eye you might require a minimum size of plant and not permit a tiny bit of moss in a crevice to give a good view.
For Voodoo Magic, what constitutes "one use" of a protection talisman? Is it one attack, or one encounter? The Channeling Companion version of this list says one use lasts 1 minute per PP spent creating the talisman (after the talisman is activated).
I would change the name of Spirit Mastery, simply because that name is already in use for a different spell list.