After a challenging summer at Ibrox, Rangers could use all the help they can get in the Scottish Premiership title race with Celtic. As the Gers have toiled to snap up many of their leading summer transfer targets, Celtic have shown a much higher degree of stability. Rangers have experienced a substantial squad overhaul, whilst Celtic – so far at least – have managed to hold on to many of their top players. Having also splashed £9.5m on one player in Adam Idah, Celtic’s superior transfer budget is one of the biggest hurdles Rangers manager Philippe Clement will have to clear. But the Belgian’s…