Learn to trust your eyes and listen to how the chain responds in the wood.
BobL's progressive filing thread on AS is well worth a few reads, if you haven't already.
Most people take one or two hard flat strokes on the top of the depth gauge and round it out some (or not), and call it a day.
I rarely make hard, flat strokes on the top of the gauge, but instead make a stroke enough to expose fresh metal, maybe a second, then make lots of light strokes in a rounded motion from the front of the gauge to the top exposing fresh metal the whole way, tying it into the top. If you can keep your motion and pressure steady, the depths all end up close enough to the same.
Some folks swear that even tooth length matters, but as long as each tooth is set to its depth gauge, they flow the same (or within micro-differences of each other)