Thanks for the question. This particular staircase would currently be difficult to re-create with railclone because of the variable width along the flight, though you could certainly use railclone for the handrails if you had suitable splines for the string paths. Because the treads overlap in plan view it's also not possible to use a clipping path, which would normally be the way I would suggest tackling a style with a variable width.
We are however working on new generators for future releases that may be able to parameterise an object like this. If I can solve this style with a future version, I'll update this thread.