I think, for sorcery to work in Conan Exiles, it might have to work together with a bit more refined AI setting to the game. Where the NPC’s don’t always attack on sight, but might gather in places, fight each other and generally be a bit more involved than they currently are.
That way you could make it so that a religious display could gather more NPC’s around you and you wouldn’t have to make them thralls. Or that religious ceremony would do the same as with the Wheel of Pain. One could also implement a mild form of hypnotism as an option for thrall taking. The NPC’s would probably have to be alone though. Against players, it could be made into a brief closeup of the hypnotists eyes, as a form of flash-bang that distracts for a moment before it is shaken off (As Conan have been known to do in some cases).
Hallucination inducing vapor could also be a thing. A form of magical defense feature that could randomly change your direction when you enter it (Provided it blocked your sight). Something of that nature could also (Again) serve as an alternative to the wheel of pain. Using drugs instead of torture or religious sway. For necromancers, it could simply be to prepare a ritual to awaken the recently dead.
All sorts of lesser curses, miracles, small acts of magic could work as long as one avoids all the usual clicks with fantasy magic. Flashy have no place in the universe of Conan.
With all this in mind, I am strongly in favor of the Corruption system with this though. A user of magic should not be a warrior, able to use magic and blade in equal measure. A sorcerer should be dangerous because of the people that fear/worship them along with their magic. Needless to say, someone playing a sorcerer should have a difficult time moving around the world without help. To make make it so that the world doesn’t turn into a war of the witches, rather than an age of Barbarism.
