I have the same timing sequence every time, and I've made them the same as the f/stops on my light meter.
2, 2.8, 4, 5.6, 8, 11, 16, 22, 32, 45, 64, 90
In the darkroom I use a metronome, because then I have both hands free at all times.
I usually start with f/5.6 (35mm), f/8 (80mm), and f/11 (150mm), and if I have to open up or stop down from there I will.
My print times are always in the 30-60 second range, which allows me to work with full seconds. In turn this gives me plenty of opportunity to do very smooth dodging and burning sequences.
That's my approach. I don't really need finer adjustments.