I made it a chain of replies with one per post instead so my whole app doesn't crash every time I open it. One of the others actually is a dragonfly. Huge pain in the ass because of how fast they move, and because they're too small for my autofocus (that's also probably too slow). But really satisfying when you get a clean one (though I definitely had to massage that one in post).
I found ~f/10 with as fast a shutter as you can get away with is your best bet to get a clear shot with a decent chunk in focus. More open than that and the plane in focus is just too narrow for me to get anything.