I know nothing about WoD, so I'll reply to your questions in terms of how I'd get it done just with DF rules, keeping in mind the laws of magic.
1. Definitely a veil. You can flavor it as a mental block against perception, kind of like Harry used in the second book, if you so wish.
2. You could do this with another block, with an added maneuver to throw a Mirror Image aspect up. They could pierce the block with attack skills, which would let them know that the double is illusory, but not necessarily where you are.
3. Depends on what you want to use your overclocked mind for, but probably a navel-gazing maneuver that you could tag for lore, perception, or scholarship rolls.
4. You basically described a run-of-the-mill block that applies against mental attacks. It's all right there in the evocation section.
5. Like 3, an aspect you throw down on yourself which you can tag for certain mental rolls or use as the justification for a declaration.
6. There is some . . . disagreement over whether sleep spells require mental stress attacks, and how that plays in to the laws of magic. Canonically we have at least 2 instances of Harry putting someone to sleep, so most tables will probably allow it, with the caveat that no consequences greater than minor ones can be inflicted before it starts breaking the laws of magic. You could also skirt the mind-magic issue and have your spell administer good old fashioned physical sleep (simulating knock-out gas and other chemical sleep inducers), though it sounds like you want mind magic here.
7. There are examples given for biomancy in the book that you could just as easily apply to psychomantic healing (removing mental stress). Keep in mind that all such spells will be thaumaturgy, not evocation, though some potions and the like may be useful for suppressing mental consequences (again, look at the examples).
8. Illusions are easily done with maneuvers and blocks, and most mind magic that does not inflict stress is ok (as I interpret the laws of magic, though this is not a universal consensus).
9. If it causes physical stress, then it doesn't matter how you flavor it. You could say that it summons a horde of fiery swords that descend on the enemy, you could say it taps directly into their nervous system and fries their synapses, but mechanically speaking both of those are straightforward evocation attacks that are defended against by athletics (or plausibly endurance).
10. This might be doable with thaumaturgy, but it would be very complex and I don't really feel like getting into it right now. Other people in these forums have more of a gift and more patience, and will help you out better. Regardless of my own unhelpfulness though, creating a temporary magical AI based on your own may not violate any of the laws of magic because you don't need to affect or violate anyone else's psyche to do it.
11. Telepathy happens in one of the books. Again it doesn't cause stress, so it is plausibly not a violation of any law of magic as long as you don't get any extra insight into their character or mind-reading out of it. Also going to be thaumaturgy, though I suppose you might be able to justify evocation if you really want to.
12. Understanding languages is another tough one, again probably thaumaturgy and again not breaking the laws as long as you only use it on yourself. I could also see this as being a good use for a potion or usable magical item, perhaps requiring 5 or so shifts of power to apply for an entire scene. But again, someone else will likely come up with a better answer.
