With the narrative threatening to turn sour for Philippe Clement and Nils Koppen, Rangers’ 4-0 hammering of FCSB in the Europa League could hardly have come at a better time. Just days after the 1-0 reverse at Kilmarnock left Rangers six points adrift of Aberdeen and Celtic at the top of the Scottish Premiership table, the Glasgow giants cruised past their Romanian opponents in a performance which not only lifted the pressure on Clement but also provided justification for Koppen’s transfer market methods. Vaclav Cerny scored twice in what was the winger’s best display yet in royal blue. Hamza …