Hi, as before I don't have any silver bullet, only suggestions that might help -
-there's an early Logos spell, Detect Enemies, that might help you identify the wall beforehand. A higher perception skill will also help.
-a dreamcoat grants immunity to hallucinations, if you can find one
-a rosewood staff can banish daemons, again, if you can find one
-a lot of daemons are particularly susceptible to light
It does sound like you've built a powerful character though. If you haven't tackled the sewers yet, or the observatory, I imagine you are strong enough to handle those places, where hallucinations and so forth are less of a theme.