The talent is in Tier 6 of Corruption (Penetrating Darkness) and adds 3% accuracy to a class that does not use it. A sorcerer, especially being a healer, has no use for accuracy. This has to be a mistake that has been overlooked time and time again.
Instead move it over to the assassin class which could actually see some use of it.
(btw devs, that would be the deception tree)