Manchester City is currently still very ready and could easily beat Real Madrid again.
Haaland is still Pep Guardiola's mainstay and as long as these two important roles are still with Man City, they will remain the strongest club after Real Madrid.
Haaland can't do much when facing Madrid, therefore Guardiola needs new players on the front lines who can accompany Haaland to be more productive in scoring goals easily. Haaland can only shine when facing an underdog team, whereas if he meets a strong team In fact, he can't penetrate the defense well and even has difficulty scoring goals. I don't think Guardiola can continue to rely on Haaland because there are still many great players who can be recruited into Manchester City's main squad to fill the front line so they can be more productive when facing strong and difficult teams. . I'm still not sure Manchester City will win the UCL next season if they don't make changes to their current main squad.

No need for Pep Guardiola to sign new players to assist Haaland, Kevin De Bryune is there to assist him but due to the injury that both players suffered towards the ending part of last season made them not to be able to Perform as they normally do, instead of signing more players to the team Pep Guardiola should consider using some of the players in substitute to balance up the challenge that Haaland is getting and Guardiola should not be overdependent on Haaland alone, he should try and build up other players in the squad so that in a case of injury he can have a reliable replacement for Erling Haaland. Haaland still shine even when playing against a strong opponent so saying that he only performs when they meet a mediocre team is not true. Remember he scored a hat trick in their derby match against Manchester United last season so except you will classify Manchester United as a mediocre team then I can agree to what you said.
One thing you need to know is that Manchester City, even though they are one of the strongest contender of the Champions League but they are mostly unlucky in winning the Champions League so even if they sign new players, don't think it will make any difference.
I don't think Guardiola will try to get another player to add for Haaland, because I think the current players will still make the club succeed and win trophies, and since Guardiola is still the head coach, I'm sure he can control Haaland without getting any player that will support, and since De Bryune is still in the club, I don't think Haaland will have any problem, and he will always be the top goalscorer in the league because he is a goals machine that no one can stop him in the league, and I am confident Guardiola will still achieve something next season because I did not think they would still get any club that would challenge Manchester City. Right now, there is only Arsenal and Liverpool that I believe will compete with Manchester City, but they usually fail, but I am not sure if Artete will change anything up to compete with Manchester City next season. They need to do something so that Manchester City can win the Premier League next season because it is a disgrace that only Manchester City has control of all the trophies in the competition and no one can compete with them, and Guardiola will do anything possible to win another title before he leaves the team because .am Seeing after next season he can probably leave the club.