As one Rangers player starts to rediscover the form that once made him a nailed-on starter at Ibrox, the phrase ‘class is permanent’ comes to mind. And, for former Ibrox stalwart Andy Halliday, seeing the £1.7 million man start to climb back towards his 2023-peak was another massive plus in what has been a good few days for the Scottish Premiership giants. Bouncing back from that horror defeat at Kilmarnock, Philippe Clement’s Rangers hammered FCSB in the Europa League. And, forming a fierce partnership with Connor Barron in the middle of the park, Nicolas Raskin’s most impressive Rangers appe…