I would agree someone is attempting to cast a spell on Susan; put a curse on her. Maybe they are just trying to freak her out and intend no greater harm. But personally, I think this will do the one attempting the spell more harm than Scheff . They should not be playing with black magic - or any kind of magic, in my opinion. It is very dangerous.
But obviously, someone disagrees. . .
From a Christian perspective, we should be praying for Scheff. Those of us who are Christian or Jewish (for Solomon had a few things to say on this subject as well) should be asking God to heal her mind and give peace to her soul. If the prayers were answered, then that would solve a lot of problems for a lot of people. If not, then at least those praying would be blessed for having had the compassion and humility to ask.
Not that I often remember her in prayer. Not that when I do, I am exactly sincere. But I believe it is understood, that sincerity in such cases, is a bit beyond anyone other than true saint. Still, one should make the effort. I'll try to remember that.
As for the psychic thing - I don't know any names, but I do know Scheff sees a psychic. I used to tell her she needed to stop that - that she was playing in the enemies' camp by doing so - but she disagreed.