Like John, i recirculate during the entire mash (herms in hlt). I go back and forth between fly and batch depending on how much time i have. When i batch, i drain the mash tun, fill it back up, and recirculate through the herms again until its clear, then drain and repeat. Chris mentioned recirculating between each sparge and it works well. Crystal wort into the kettle each time.
I've been leaning more towards fly sparging lately...takes longer but i hit over 88% efficiency every time and it gives me time to clean up.