Long term that is definitely the best forward line, but I don't think Rashford is physically ready to lead the line by himself just yet. He has come a long way physically over the past few years but has a bit of a way to go still, for me. His hold up play is effected as a result of this and that is a facet that Zlatan has an advantage over him in. But I'm confident in a year or maybe less Rashford will have it all.