Looking at the league table I think it will be hard for us to qualify for a European spot unless we win at least 5 of our last 8. With the poor performances of English teams in Europe this is how things look currently for next season:
Top 4 ->Champions League
5th -> Europa League
6th-> Europa Conference League
1 Additional Europa League spot to the winners of FA Cup. If that ends up being City, then it would mean 6th goes into Europa League, and 7th to Conference League.
Looking at Newcastle's remaining fixtures I would say 6th is now their's to lose. So Man United will see FA Cup as their best option. Probably our best option too, although getting past City will be a huge challenge given form and injuries.
Hopefully we can find a way to win tonight. Any other result and realistically it will be all on the FA Cup for European chances.