Two things, but I feel the need to mention them both:
1. It's a challenge to remember to use your sights when you're trying to engage multiple tough targets while moving quickly, and using your sights is good.
2. Same rules of target engagement apply to swingers as they do to any other target...as do the basics of calling your shots. Conversely, spray-and-pray works even worse
on swingers than it does on other targets.