Ramos may be able to help Sevilla's defense this season, but one cannot expect him to perform as well as before considering his age. As an experienced player, I am sure Ramos will play a good role in Sevilla's defense and he has proven it at PSG last season.
Ramos' performance is still good and he made 33 appearances last season in Ligue 1. Sevilla must give him trust or even a big role so that the team's mentality and defense are good. But I don't rule out the possibility that Sevilla actually also needs a good striker, clearly that could encourage more possibilities in their plans to win the match. La Liga has tough competitors, that's why Sevilla can't just carry out its mission without good squad depth.
Ramos is a strong defender, but we must know that he is no longer in their best form. I am not pessimistic about his contribution, he may bring positive impact for Sevilla defense line. However, with the current situation on Ramos, I don't think Ramos can significantly improve the strength of Sevilla defense. Moreover, Ramos often gets injured, he may be absent in some matches.
Sevilla actually has a good striker, En-Nesyri. This player often shows amazing contribution for Sevilla. But it is good if Sevilla has another strong striker, it will strength the power of Sevilla attacking. Anyway, there is something crucial for Sevilla, they lost their main goalkeeper. I think they also need a strong goalkeeper now.
After 19 years playing with different teams finally Ramos was return to Sevilla again so this is fantastic moment for him because he want to ended his career with Sevilla and indeed Ramos has passed his prime and i am sure he will be unable reach to his top performance again just like when he was showed while he playing with Real Madrid but at least he can give a significant contribution to Sevilla current conditions with his experience and besides that we all know Sevilla will playing at several different competitions and the manager can played Ramos as the options of defender player
About Youssef En Nesyri he was playing with Sevilla since 2019 and although from goals records his performance is not too impressive but at least En Nesyri can help Sevilla to gets several trophies but Sevilla have to hard work to defend En Nesyri because the rumours is AC Milan was interested to him and they will attempts to bought En Nesyri from Sevilla this winter