Rangers will have to shop clever when the transfer window opens with Philippe Clement hoping to secure upgrades all over the pitch. As seen against Hearts once again, a more clinical forward line is a must if the Scottish Premiership title is to make its way back to Ibrox next season. Oscar Cortes looks to be returning to the club and hopes of a permanent deal for Abdallah Sima are also high, but Rangers fans can dust off the disappointing league campaign with news of a new striker attracting the manager’s attention. READ MORE: Rangers confirmed signings, transfers in and out, loan exits, rele…