I hate Directors of Football (DoF). They are a very useful asset in that they can perform scouting, transfer and contract tasks for you but I am a very hands-on manager and I much prefer having full control. This means I will be looking to remove the Director of Football from his role and bring in a scout or two in his place.
One head physio and two physios will be more than enough to cover the base in lower league football. In the future, we will be looking at adding more physios, as well as Sports Scientists and Club Doctors. They are important for top clubs in modern day football.