I have solo-ed scenario 1 with this deck I made and I managed to get the R1 resolution. The page discusses how it plays. The short of it is Scry the encounter deck to hold off enemies until you can get a Shrivelling in hand. Even then try and not use it if you can so you can save it for the big bad in scenario 1. Investigate using the Flashlight if you got it or one of her pretty handy investigation events.