Considering the circumstances around Rangers’ underwhelming start to the season, the prospect of more signings being the solution feels a rather fanciful one. The work of Philippe Clement and Nils Koppen has come under increasing scrutiny of late, exacerbated by Wednesday’s damaging 2-1 defeat at Premiership pacesetters Aberdeen. Only three of this summer’s signings started as Mohamed Diomande and Robin Propper were dropped to the bench. Cyriel Dessers, brought in for pretty much the same fee Celtic paid for Kyogo Furuhashi, endured a miserable evening in attack. And while Koppen does deserve …