Why is everyone **** bent on buying wingers? On the left wing there's already 60m Di Maria warming the bench at this point and Young is definitely staying the way he's been playing. I'd imagine Januzaj might be leaving since he's been wank and far too low in the pecking order.
Reus is out of the question anyways, since you need width on the left with Mata cutting inside from the right.
For me the primary focus should be in 3 areas: CB, RB and Carrick replacement needs to be lined up - he's getting old and injury prone.
If there's some money left or if RVP/Hernandez can be sold well, a second top striker wouldn't hurt, since you'll need that for CL games.
Carrick replacement is present in Blind, similar kind of player, and will improve even more with age. Young is getting old, Januzaj will be out on loan, most probably, our main wide players will be di Maria and Mata. Depay will definitely a good investment, plus he's young. Although he likes to cut-in a lot too.
For CB, hopefully we'll get in Hummels, RB seems done and dusted (apparently) with Clyne (although I still prefer Rafael :\);; remaining ones are a CM (Pogba/Schneiderlin/Gundogan) and ST (please no Cavani)