I know this sounds extreme but let's buy a genuine #9 who's going to stay fit and leave Sadio to the wings and doing whatever he likes.
Revolutionary thought's If I say so myself, let me know what you lad's think.
Seeing as you asked...
Assume we get the perfect number 9 (which we all want), who stays fit, is prolific, is affordable, wants to come, etc
What happens if mane loses form mid season, or gets injured? We then need the perfect stand-in widemen who is affordable, wants to come, happy to be a understudy etc
That's 2 difficult holes to fill in 1 preseason, alongside a left back, centre back ....
Having a mane in your team, probably makes it harder to sign another decent wide right, unless you make it clear the plan is to shift him inside.
Getting 1 wideman, actuallyt leaves us with 2 proper widemen, who can stand in for each other, as well as an improvement thru the middle. We improve the 1st 11 and the back up options in 3 positions, by buying 1 player.
It would be great to sign 4/5 world class players this summer (upfront, gk, left back, centre back, centre midfield) And then getting quality back ups on the wings, box-to-box midfield, fullbacks who are happy to be under studies.
But I don't think we have the funds, nor could we tempt then, nor could we out bid our rivals for all this and even them klopp doesn't like too many additions in 1 windows.
We need to be more realistic IMO