Apart from Arsenal, Barcelona, and Juventus, I don't see any other strong contender that is capable of stopping Manchester united in the Europa league. Eric Ten Hag has done a great job so far, and I believe he is setting every system to go for the Europa league title. Manchester United is so hungry to get a title for some seasons now, it will be so good to see them register another Europa league title after the last one in 2017 in Sweden.
IMO, Arsenal are more established in game than the other candidates. if I compare all the existing teams, Arsenal always display a consistent game in every game. as for The Red Devils and Barcelona, these two teams have just built their squads. even though in their matches, these two teams almost always win every game. However, in terms of stability, play and readiness, Arsenal are superior.
On the other hand, I rarely watch Serie A teams, however, based on the matches I've watched and the stats they have. Allegri's squad has not always been consistent, especially with the recent cases that have befallen them. I still favor the Gunners, despite the fact that we will never know which team will make it to the final round.