When Rangers signed Mohamed Diomande, the midfielder became the poster boy of the club’s new transfer vision. Here was the Ibrox club, under the leadership of new director of recruitment Nils Koppen, tying down the immediate future of one of West Africa’s brightest talents. The fact that Mohamed Diomande used to train in a Rangers jersey after leaving the Ivory Coast for the Right to Dream Academy in Ghana only added to the romanticism. Rangers have set about restructuring their squad with the aim to produce a revolving door of talented youngsters who can develop their skills, deliver trophies…