Al Nassr already has good quality attackers. I think they only need to focus on building their defense. The midfield line is also needed a big improvement if they want to compete with Al Hilal. Just look at Al Hilal, they only got 23 conceded goals during the season of 2023-2024. Meanwhile Al Nassr got 42 conceded goals. Considering the number of conceded goals, we can clearly know the difference of Al Hilal defense quality and Al Nassr defense quality. 
I've said it many times that Al-Nassr needs to strengthen its defense line, including the goalkeeper if they don't find the right players in this transfer window then there is no way to compete with Al-Hilal. We can check the standings Al-Nassr is only able to compete in scoring goals because they have some great strikers but look at the defense line Al-Nassr conceded 42 goals while Al-Hilal only conceded 23 goals that is enough to prove that Al-Nassr has a weakness there.
Reportedly Ronaldo asked Al-Nassr to bring in 2 players to strengthen their squad Casemiro and Nacho Fernandez are on the request list, Ronaldo definitely knows what the team needs it's just that so far there has been no further confirmation of this news. Actually, Casemiro had the opportunity to move to Al-Nassr because the situation was not good at Manchester United as we know, he is considered to have made mistakes in several matches.