I've never used brouter.
My work flow is:
1. Talk to other cyclists to find nice long distance routes. Google the country I'm in for interesting places. Google cgoab. From that I find waypoints that I want to visit.
2. Use https://cycle.travel to generate route suggestions. Compare with Google maps (pedestrian) routing.
3. Compare with OsmAnd "balanced" routing. Sometimes with "elevation" enabled.
4. Start cycling.
Where OsmAnd excel is modifying the route. Adding additional waypoints: "first intermediate destination", "subsequent destination" etc.
Or I would compare the route with the one I downloaded from cycle.travel while I'm riding.
OsmAnd can highlight Euro Velo and other cycle networks and sometimes I will follow that instead of the route generated by the software.
PS: I rarely wild camp. I often look for cheap accommodation on booking.Com, Google maps or Warm Showers. That complicates the above process even further.