Real Debrid combined with Sonarr/Radarr is an excellent combination with rdt-client as the torrent software. Most of the time the files are already hosted on RD, so you don’t have to wait for the torrent to download, and it sometimes has files for torrents that no longer have seeders
Just Google rdt-client. The GitHub page explains how to set it up. You can watch the files using Plex, Jellyfin, Kodi, Infuse, etc.