offset mode is very handy believe it or not.
the first thing I do when I receive a project I go through all the levels of all the tracks.
Vocals:
vocals sometimes have levels jumping all over the place. what I do is isolate sections of the song and automate levels of the track to be more consistent. IE- the verse is -6db / the chorus jumps to -1db
this way my compressor is not working over time / breathing trying to fight a level -10db to + 10db.
by doing early automation I can later go in to offset mode and then automate the whole track again and not have to worry about earlier automation moving again.