I tried solo Roland Banks and got through the first three scenarios of Night of the Zealot, but he went crazy doing Return to the Night of the Zealot. Currently trying two Investigators - Zoey Samaras and Harvey Walters - and they have gotten through Night of the Zealot, and The Gathering of Return to Night of the Zealot, but with the physical and mental trauma they have accumulated it's tough! I was hoping to keep going with them but might have to start new Investigators for Dunwich.