Hey how do i improve the skills of my players. How good do the staff have to be for a consistent rise in skill?

more than one star mate and put points on goalk strik mid def coaches. ;)

the better your striker, midfield, defense, and goalie coaches are the quicker your players will improve. My goalie coach was like a 5 star, and through one season my goalie went froman 84 to an 89. Younger players like in their early 20's seem to improve the best and the old ones actually just get worse meaning they need to retire.