Rangers have battled back to the upper echelons of Scottish football after their promotion from the Championship was secured in April 2016. The Ibrox giants heralded in a new era just a few months later when they played their first top-flight league match against Hamilton Academical and from thereon in, it’s been up, up and away. On the road back to the top, successes like the Scottish Premiership title in 2021 and the famous run to the Europa League Final in 2022 were fuelled by some cracking transfer incomings. But it wasn’t all plain-sailing. It took Rangers a few years to establish themsel…