For those who were a little disappointed with the Occult Adventures options for the Psychic should check out the new Rebirth discipline from Occult Origins, already included in the pfsrd here.
Of greatest note is this discipline ability:
Mnemonic Esoterica (Ex): By reaching into the recesses of your past lives, you gain knowledge beyond that of most psychics. Select a single additional spellcasting class. Once per day when you prepare your spells, you can add one spell from this class’s spell list to your spells known and class spell list for 24 hours. This spell must be 1 level lower than the highest-level spell you can cast, and you cast it as if it were psychic magic (Pathfinder RPG Occult Adventures 144). You can decide to change the spellcasting class from which you draw this spell each time you gain a new level.
Um, wow.
Beyond the obvious floating utility of this, it has some pretty strong synergy with the Amnesiac archetype to get multiple floating spells known per day, so you can take a step and a half towards prepared caster flexibility and differentiate yourself from Sorcerer builds.
You can also combo nicely with Scribe Scroll to load up on ace in the hole utility spells during downtime. You're going to have to UMD them, so either give them to an appropriate party member or take Pragmatic Activator/Dangerously Curious as traits.
A human with all of these options is pretty amazingly flexible at mid levels, and can still use phrenic amplifications like Overpowering Mind and Undercast Surge to maximize their hitting power with mind affecting attacks in the usual Psychic wheelhouse.
Anyway, take a look at it. The spell list is largely garbage, but there's a few really good information gathering options (Contact Other Plane two levels early?!) and you also get your own version of Bardic Knowledge. The other two discipline powers are decent.
Edit: Actually, the floating spell if it's also on the Psychic list would let you scribe scrolls that you could use without a UMD, so that's potentially even more useful, although you might take a level penalty (e.g. you are borrowing from the Wizard list and scribe Plane Shift as a level 7 rather than take it as a known level 5).
I'm thinking of doing a Rebirth Psychic for an upcoming PFS game next week. Are they still considered strong? Does the floating spell option actually allow you to bypass UMD?
The Mnemonic Esoterica ability does say that you add one spell to your spells known as well as to your class spell list. The part about adding it to you class spell list prevents you from having to use the Use Magic Device skill for scrolls, wands, and the like that contain that spell.
Note that there are other classes with similar abilities. For example, the Medium, when channeling the Archmage or the Hierophant, bumps up his spellcasting from 4 spell levels to 6 spell levels and can choose one spell per spell level (from the Sorcerer/Wizard or Cleric spell list, respectively) to add to his spells known and his class spell list for the day.
And don't forget about that Samsaran racial ability that can add a bunch of spells from another class to the spell list of your primary class, permanently.
