That's not equalizing, that's creating positive pressure. Since the pressure will drop back to ambient as soon as you open your airway, you'll need to maintain the positive pressure including pinching your nose as your head goes under water.
I'm not saying this is a bad idea, just that it's more involved than doing a quick Valsalva before descending.
I'm in the camp of doing the first equalization at 1 or 2 feet (half meter) and then every couple of feet through the first half atmosphere. I increase the distance as I continue to descend.
However you do it, I agree that it's vital to stay ahead. If it hurts at all or won't clear, then ascend a few feet and try again. Repeat until it's successful and then do it more often as you restart your descent.