The sample size may be small, given that Philippe Clement and Nils Koppen have only had one transfer window together at Rangers, but former Ibrox striker Kenny Miller feels that there are already a few conclusions you can draw from the club’s January business. Mohammed Diomande and Oscar Cortes, joining from Nordsjaelland and RC Lens on loan-to-buy deals, are aged 22 and 20. Fabio Silva, the Wolves-owned striker who does not have a purchase clause in his contract but may still be considered for a permanent move, is still only 21. Some of the club’s other mid-season targets – Owen Beck, Jefte V…