The average age of the starting XI is 29, most of the regulars are locked in through 2021 or beyond and most are on the sort of wages that make them difficult to sell. But perhaps that’s not how Real Madrid president Florentino Perez saw it. Perhaps after three summers in which not a single starter was added the last two, Toni Kroos and Keylor Navas, arrived in 2014 the plan for 2018 was to blow up the team and…