As far as revenge goes, it won’t quite ease the pain of seeing Celtic celebrate yet another Scottish Premiership title. It certainly won’t offset the heartbreak of last weekend’s cup final defeat to Rangers’ Old Firm rivals at Hampden Park. But, with the season over and Rangers left to stew over a campaign full of ‘what might have been?’ moments, the transfer market at least offers Philippe Clement and co the chance to make things a little trickier for their green-clad rivals from across Glasgow. Alongside a new left-back – tick, Jefte Vital arriving at last – a central defender, a midfielder,…