Just a suggestion, for those non-pro photog but wants to try shooting stage performance eg ur children's kindergarten graduation where the stage lighting doesnt change or non at all.
1 of my friend using 2 strobe (with build in optical slave trigger) for that. One of the strobe is on wireless trigger (cant remember which sys. he used) while the other on optical trigger.
The problem he faced is, the one on optical trigger kept firing because other audiance was taking photos with flash.
So below is my suggestion :
Not only the working distant is increased, both strobes (represented by my 2 flashguns) will not be affected by flash from other cameras.