I can’t speak for anyone else, but I have found I am able to do maybe 2-3 with out resetting. A big part of this is the breathing technique–which must be focused on if you are going to reset every few reps. That being said, as the weight gets heavier and I find myself doing sets of 2 or 3– I reset between every rep. What works for you? I can tell when I really nail the form in the dead lift and when I am only 80-90% perfect. Resetting helps keep your form as perfect as possible.