Objectivetruth:
i do not have specifics for you. Only speculation. My father professes to be of the anointed and was an uber elder in the circuit/district back in the 70s and 80s. He often communiticated with the WTB&TS.
I often noticed that those in the congregations I belonged to who complained of demonic attack just happened to be on psych meds or stated they used to take them, which means they should still be taking them.
These "demonic" experiences always came in the form of hearing or seeing things only they witnessed. I remember one family where the husband, wife and one of their three daughters were all mentally ill and when they were off there meds it was a living hell for the elders. I remember another sister who saw vans that followed her around. The couple who studied with her convinced her it was demons and that psych meds were poison. She turned into one of those hoarder cat ladies who washed everything in salt ( not salt water, but pure table salt) to wash out the demons.