16 bit for cd.
24 bit otherwise for high definition audio.
MP3 for small and portable.
I never export 32.
Flac doesn't seem to be actually lossless to me. If I save a wave to Flac, export, import, null test, normalize, I don't get silence.
If Flac was lossless, I would save as Flac not 24 bit wave.
For use in movies, you might want 48K samples per second rather than 44.1K.
Saving to double rates like 88.2 or 96 might make sense if you were sending it to be mastered.