This might sound like I'm a crazy hipster, but someone should tell him to play our Strikers in the Striker role (one of Sandro or DCL), wingers in the winger role (Mirallas, Lookman, Vlasic), and play one number ten instead of three, mental I know, but it just might work.
The decision he's made to expect 4 midfielders to replace Lukaku's goals is a bit mental, midfielders need a focal point to move play forward in order to get a goal scoring opportunity, otherwise we're just going to be passing it to each other in midfield all day like in that Simpsons episode.