I found the routine that works for me which is Selsun Medicated shampoo twice a week and tar shampoo in-between. I still get dry and a little bit itchy scalp but no visible shedding flakes.
The tricky part for me was to realize that overly aggressive shampoos do more harm than good, so the dosage of active ingredient is key. I used to use Neutrogena Tgel Therapeutic tar shampoo, with the lowest dose of tar component, it is however hard to find now and looks like it’s being discontinued, so I switched to MG217 Therapeutic 3% which I dilute with whatever generic shampoo my family is using.
I always have Lofi Girl playing quietly in the background when I’m working.