It depends on how you view this, really? If it's "Who would we miss the most if they were out?" it would be VVD or Alisson. However, assuming both remain fit till the end of the season, both are in good form and are very reliable. If Salah can get closer to last season's form for the remainder of the season, that could definitely be the difference between winning trophies & coming up short, so I've plumped for Mo.