Direct answer
Start from a readable Royal Road chapter, add it to FanFicBinder, and use sequence fetching only while the next chapter link keeps resolving cleanly. Export the accumulated chapters as EPUB when the sequence is complete.
Why this source is a good fit
Royal Road chapter pages often expose clear next-chapter navigation, which makes them a reasonable fit for sequence-based collection when the site stays readable through the fetch path.
When to switch strategies
If chapter navigation breaks, if extraction returns the wrong content, or if the source begins rate-limiting, stop and fall back to Manual Entry for the remaining chapters.