I don't even know why would you buy a striker at this point. Rooney/Rashford/Martial will have it covered. A mobile RW who can also play on the left is a top priority I think.
Load of Carrick and Fellaini, get Laporte so Blind can move to CB and rotate with Bastian, add another CM as backup for Schneiderlin, and it should be set.
Wouldn't that be making the same mistake as we did this season though?
Only difference is you are reliant on Rashford, Martial and Rooney to get you enough goals in striker position. Personally don't think Martial will even play as striker much as he is more effective on the left.
So realistically that leaves us two known strikers, I'd say one of our biggest problems this season has been lack of goals and Rooney's lack of contribution for large part of the season. Not getting a striker would be a huge risk and unnecessary in my opinion.
I really think Rooney is done, how much longer do we give a player who very rarely delivers anymore and when he does gets injured.