Hello, Angelheartist. I have been fiddling with my Simucube, Large Mige, SinCos encoder and Assetto Corsa lately, studying the forums at Granity and Assettocorsa.net. Attached are the settings I've come up with so far in my efforts to get Assetto to feel as good as the gold standard for FFB and physics, Automobilista.
First off, I would note that the screenshot showing AC's in-game settings is from the Assetto Corsa Content Manager, which is an outstanding replacement front end for AC. It is very useful for FFB settings because it has on a single page not only the normal in-game settings, but obscure settings which are buried in ini files (like gamma, gyro, dampening settings). The basic version is free, and can be found through Google.
Important to note, too, is that I set up my overall in-game FFB gain at 100 %, then within each car I tune the gain to minimize clipping. I think one gets greater dynamic range this way, as well as some of the desirable clipping on jolts that tame the DD power when it is excessive. I'm still experimenting with SimuCube "Overall Strength" vs in-game gain.
Hope these help, and I would be thrilled if you and others can critique and tune these settings.