Syncthing is not as good as Resilio Sync at syncing huge folders quickly. Resilio Sync can sync 10 MB/s on my wired home internet, but Syncthing usually uses only about 1-8 MB/s. Not sure why.
So in my case my server would be 10.0.0.1 and I have two devices, let's say 10.0.0.10 and 10.0.0.20, I would putmy servers IP in as tcp://10.0.0.1:22000 in the settings page.
You can then even disable most of the doscovery options (if not all). Curios if you will see improvements!