Psion Slot 3
{Animate Dead}, Bestow Curse, Clairvoyance, Dispel Magic, Fear, Fly, Hypnotic Pattern, Intellect Fortress*, [{Leomunds Tiny Hut}], Major Image, {Nondetection}, [Revivify], Sending, Summon Astral Entity*, Telekinetic Crush*, {Tongues}.
TELEPATH FLAVOR
Bestow Curse, Fear, Hypnotic Pattern, Intellect Fortress.
(Shaper)
Dispel Magic, Major Image, Nondetection, Summon Astral Entity.
Ritual List (not the Spell List): Tongues.
Tongues is an interesting ritual, but is normally to situational and is a nonuseful spell. It belongs in a separate list for rituals, but not in the Psion spell list.
Note, spells like Major Image do well to target an area equivalent to a Size (Tiny, Medium, Huge, etcetera), instead of guessing weight or grid counting.
Here the Summon Astral Entity flavor is, a new reality forming from a projection from the mind of the caster.
PSI WARPER FLAVOR
(Seer)
Clairvoyance.
Ritual List (not the Spell List): Sending.
Sending is a ritual, not a useful spell. It is a trap option in a spell list. In any case, it is underpowered for its current Slot 3.
METAMORPH FLAVOR
[Revivify].
I mention adding [Revivify] here. But I feel it specifically belongs in the Metamorph subclass spell list, rather than here in the Psion base class. The target of the Revivify is not dead yet, and can still benefit from metamorphic body magic. This along with the Cure spells, allows the Metamorph to function as a dedicated healer for the party.
PSYKINETIC FLAVOR
Fly, Telekinetic Crush.
Ritual List (not the Spell List):
[Leomunds Tiny Hut].
I am happy to Fly here. It is exactly correct. I wouldnt cry if only the Psykinetic subclass has it, but it is fine here for any Psion who wants it to pick it.
I added [Leomunds Tiny Hut] to the spell list because it is a force construct, akin to Wall of Force. But then I also removed it from spell list in the sense that it works better as a ritual, than as a spell. I view a "Ritual" as not spending a spell slot, and therefore not done by the power of the mind of the Psion, personally, at least not in any direct existentialist sense. A ritual can have any weird requirement to perform it, perhaps here use up a psi crystal that took two days to grow, or whatever. It is fine if only the Psykinetic subclass has this.
CHANNELER (PLANAR MAGIC)
{Animate Dead}.
There needs to be a separate subclass for planar magic. There is an argument for extraplanar concepts being psionic, but I prefer they are separate from the flavor of the base class. Contact Other Plane, Planeshift, Banish, Speak with Dead, perhaps Summon "Astral" Entity, and other phenomena relating to the other planes of existence are in this subclass, class.
I feel the Psion base class intimately involves the Ethereal Plane, especially the Border Ethereal that is part of the Material Plane. This is where the outofbody soul goes as it roams thru the Material Plane as a subtle influence to remote locations. Moreover the ether of the Ethereal Plane is made out of forces and inherently includes the telekinetic forces that the Psion personally wields.
Beyond matter and ether, an individual Psion might have affinity with other planes of existence, but not necessarily so. Feywild, Shadowfell, Elemental, Astral, Celestial, Fiend, and Aberration, are each conceivable. But these other planes feel less about the "power of ones own mind", and more about a Warlock "channeling the power of someone elses mind". I feel they detract from the distinct psionic flavor of the Psion. It is better if a separate subclass contains and explores the "Channeler" of such entities beyond.