The Arsenal game makes things tricky, though. Feels like they’re stuck between a rock and a hard place—risk the league or risk Europe. Either way, this next week is going to be huge for them.
Manchester United is at a very tight spot but I'd expect Amorim to know which to give priority. If he can get a defeat against Arsenal and a victory against Real Sociedad, looks to me like a good result. They need the Europa trophy badly because it's their golden ticket to the champions league. So I don't expect him to give much importance to the Arsenal game and to hand Chido Obi and Harry Amass their first premier league start in other to rest other players for the Real Sociedad 2nd leg game.
Amorim must know what his priority is right now. With the first leg ending in a draw, Amorim must certainly maximize his team in the second leg. I am also not so sure they can reach the final, however, United's situation is not good enough. Amorim will only maximize the squad he currently has. United are in a difficult situation and in the second leg, they must win. Facing Arsenal is not an easy match, but I am sure Amorim will not make mistakes. There is a break for rest, the most important thing is to avoid the risk of injury.