We said a lot about Salah and the trio but let's see a trio is made up of three players, not only Salah. Salah must to get support from other two players and he has to support them to. Together they made great success for the trio but only them can not bring Liverpool to success. They need support from midfielders, defenders and goalkeeper. Not yet mention about Klopp and different staffs in the club.
Salah is a most recognizable player in Liverpool but he can be their problems too. At least we see how Mane was not happy about that. It can be one of reasons Mane left Liverpool. I my opinion, I don't think Mane has less contribution for Liverpool than Salah. But I disagree with some on field reactions of Mane against Salah, that is bad and unprofessional.
Trio Mane, Firmino and Salah become the history how success Liverpool reach Primer League and UEFA Champion League trophy, dominance become competitor for Manchester City on Primer League and success bring Liverpool to UEFA Champion League final last season before defeating by Real Madrid is the key of Liverpool trio. But I don't sure with Liverpool for next season will have top level performance after leaving by Mane, although not ever scoring goals like Mohamad Salah I think Sadio Mane is the key and important player for Liverpool for giving assist. Although have arrived Darwin Nunez and top performance from Luiz Diaz I don't fully believe with Liverpool keep consistent for next season.