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If the owner is 15th level or higher, or has access to a feat that alters his mechanics.
If I'm not mistaken, Psicrystals use 1/2 their owner's HD, and their BAB is as a Cleric. So, at level 15, your Psicrystal manifests powers at +11 to hit.
Deliver Touch Spells at level 3. Relevant line reads, "The psicrystal can then deliver the touch power just as the owner could." My understanding is these are not Ranged touch, but only Touch, but I could be wrong.