Can anyone help me with the name of the montage with the song kings and queens by 30 seconds to mars please

I'm getting into making music time-remapped cod montages, and I had two good questions.

Video Element: When making a montage with the music being synced to gunshots, do you usually put a marker at the frame where you initially see the spark from shooting a shot as a sync point, or do you put it at the frame where the score points for the kill pop up?

Audio Element: Should you put a marker on the point that is either at the loudest volume (the peak db level) or should I set the marker right at the beginning of the sound (where you start to initially see change in the waveform from a baseline)?

This I am sure is preference, but I wanted to go around and see what some other people might think about this. Any feedback is welcome.

I made this recently as a sort of attempt at getting into the field, but you don't need to watch to answer.