Stick with Sandro up top or play Rooney as a 9 and play Klassen in the 10. Rooney's pace has long gone, but what he can do is be an absolute pest, hold the ball up, bring others into play and hopefully cause enough disruption and distraction to create opportunties for the likes of Klaassen and Gylfi. But for that to work he'll have to stay up top, playing on the shoulder of the centre backs. If he starts coming deep, looking for the ball there's no point. The problem i've got with Wazza playing as a 10 is that he ends up all over the place looking for the ball.