The points are based on the number of recruits and their corresponding skill levels. All recruits have an underlying value. Bonus points are gained for signing nationally ranked recruits and a 5 star recruit is worth more than a 4 start recruit, etc. The point system used is very much tied to the skill level of the recruit.
Therefore, the higher rated guys available in the recruiting pool will garner more points in the recruiting ranking. Since these two are so closely tied and it is an intrinsic element of strategy within the game to determine values, we cannot give out the formula for determining the ranking points.