Ronaldo has always become savior for al nassr. He was not only helping al nassr but he was also helping the league so much in pushing it to be larger scale competition with so many european stars on it. It's very hard to imagine the league without him.
Not always but he scored many goals for Al Nassr and wasted many opportunities too. If he is younger, has better body, I believe he would not miss those opportunities but it is life and his career is already very long. At his age, many old players would choose retirement and enjoy their life, not continue playing like Cristiano. I admire his ambition and motivation to keep playing with highest professional but fact is he is actually affected by his age recent seasons. He scored many goals by help of his team mates and he should thank to his team mates for great chances and assists he got so far.
He has been also convincing a lot of european players to move there. Many people said that his age was preventing him in producing as many goals as possible but they are all wrong.
It is true that Cristiano is a first brick to kick off a massive wave of super star and star players from Europe to Saudi Arabia. The league and clubs there do not only have star players but also have three super star players, Cristiano Ronaldo, Karim Benzema and Neymar. If Messi had not refuse to join, they would have gotten him too.