This is what we came up with for psychic powers...
Some general thoughts. Magic is What You Are; Psychic Powers is What
> You Can Do. This may look like hair-splitting, but it represents a
> fundamental difference. When you break a Law with Magic, you're
> changing what you are; but wizards kill people all the time with swords,
> guns, cars, etc. and nothing happens to their basic nature. (Hence why
> Wardens used to be issued swords.) Psychic powers are a tool; a very
> potent and flexible tool, but still a tool.
>
> Psychics are Subtle. Part of that is necessity, but part of it is how
> those powers work. In the Subtle vs. Overt categories (see the section
> on spellcasting on this) Psi always falls on the subtle side of the
> fence. Although psychics CAN kill with their powers, they prefer to use
> those powers to help other people kill. (When necssary...)
>
> Mechanic-wise, Psychic powers fall closest to Channeling; a focused
> Evocation power. Great with short-term effects within their field of
> speciality. Ritual casting I see as more of a plot-device, NPC thing.
> (For a Ritual, each psychic can contribute 1 point to the ultimate
> effect. Just one. It takes LOTS of psychics, working in concert, to
> achieve the sort of thing that a Wizard can do just by taking a little
> time and effort.)
>
> I also see psychic powers as always working as a form of contest. What
> do I mean? Okay, when a Wizard uses power, he gathers it and releases
> it towards a target or effect. A Psychic extends their power to contact
> their target. So, a psychic, metaphysically, is poking their targets
> with a pole. A sentient target can conceivable grab the pole and shove
> back, injuring the psychic (who has opened a direct link to their mind).
> Whereas if Harry throws fire at you, you can block it, avoid it, or
> shrug of the damage; but sending it back would mean instantly gathering
> up all that power and chucking it back. Even then, you'd still have to
> target Harry with the effect.
>
> Psychic: Telepath (-2 Refresh)
One stress point for using any effect, as per normal
> Evocation/Channeling rules. Requires Perception/LoS. Most active
> powers require Conviction vs. Discipline.
Some sample 'rotes'
>
> Mind-Reading: Conviction vs. Discipline; takes shifts to gain
> information (the more detailed, the more shifts required). Can only
> gain information specifically searched for (no freebies!) Might gain
> knowledge of target's Aspects. If target wins the roll, inflicts
> additional stress (one per shift) and ends all attempts that scene.
>
> Detect Lies: Allows the psychic to use Conviction to sense Deceit and
> other manipulation. Passive, so no chance psychic can suffer damage;
> but not infallible. Useless against the Fae. Only detects a lie that
> speaker KNOWS is a lie.
>
> Sense Minds: Conviction vs Discipline. Lets psychic know how many
> people are present.
>
> Emotion Control: Takes shifts to alter emotions; 1 per level. (So,
> inducing lust at a nightclub on an enthusiastic dancer? One shift.
> Bringing someone from a meditative calm to berserk fury? 3-4 shifts)
> The emotion will only be momentary, but use of skills can extend the
> effect.
>
> Mind Control: Possible...but extremely difficult (Remember, this is an
> Overt use of the power...) It would take 4+ shifts to impose an Aspect
> on someone...and it would only last a scene. To permanently change or
> impose an Aspect requires a Milestone, and the psychic must have access
> to their target during that time. It's much easier just to pay people
> well and treat them nicely if you want their loyalty. Sadly, the same
> restriction applies to repairing damage done by other Mind Controllers.
> It also means the telepath is risking Consequences (remember, the target
> can damage the psychic...). In game terms, it's safer just to kill
> renfields rather than try to 'cure' them. Even a healed target will
> have the Aspect "Mentally Fragile" or something similar as an Extreme
> Consequence afterwards. It's easier to break people than fix them...
>
> Basically, if it's a passive, perceptual effect, the psychic is
> reasonably safe. Actively targeting people carries risks; permanent
> changes aren't generally worth the effort.
>
> And since the telepath is opening a link to their mind, an unscrupulous
> (but talented) Wizard could use mind magic to attack the telepath, even
> if the Wizard wasn't the target. Of course, that would automatically
> give Lawbreaker to the Wizard, so only an evil sorcerer would do such a
> thing...