I should note Wolf should have some amount of resistance via not being trance'd by Butterfly. That said, most of the others would eventually kill Wolf (though I imagine he'd eventually work out how they worked). Killing him wouldn't be incap, however.
Basically, I see it going like this, and I welcome Dargoo to enter in and prove me wrong instantly.
Geralt has no reason to amputate Wolf and no prior knowledge to make him more likely to do so. Wolf has no idea what the signs do. Geralt picks one of the signs at random. At best he chooses to freeze him solid and temporarily harm Wolf, at worst he uses his mind manip and Wolf manages to ignore it (as IIRC it doesn't affect too many minds).
After this, like a sane human being, Geralt says 'doo dee doo, I killed him, neato'. Wolf gets up and garrotes Geralt if the situation favors him, or Geralt is to far so the fight merely resumes. In the former case, Wolf kills him and claims victory. In the latter, both begin to figure out their opponent's abilities- Wolf manages to deduce that the signs are Geralt's power, and Geralt begins looking for a method to actually kill Wolf.
Either way, Wolf has the lesser duty to perform here. Figuring out the signs and that they signify significant danger is easier than figuring out that Wolf can only be incapped by cutting off limbs. Geralt may get lucky and manage to deduce it, but I wouldn't bank any money on that.
Based on this view of events, I believe Wolf would manage to kill Geralt, either by surprise or some other means, before Geralt manages to incapacitate Wolf sufficiently.
