Short answer: After the limiter with a true peak -1 and short term lufs anywhere from -10 ish to -6 lufs. True peak being the only real thing I take into account and if the limiter distortion that is added is nice or is not working at all.
Regardless break all rules all the time if it works for your music. Here is a funny example https://www.youtube.com/watch?v=LZyybvVx-js . The chorus is slammed to insanity which works with the journey of the song. Overall loudness correction -2.8 db with 61 million plays and 29 million subscribers. In other words always work from emotional intent