The reason why we are trying to bring Kim Min Jae, Mount, Harry Kane (or Højlund) is because ETH wants to play back three for sure with alternative options:
Primary formation:
------------------H.Kane-------------Rashford-------------------
--------Mount/Eriksen-------------B.Fernandes------------
L. Shaw----------------Casemiro-------------Wan-Bissaka
---------L.Martinez---R.Varane---Kim Min Jae----------
-----------------------------DDG/GK----------------------------------
Now this seems more like the best-in-Europe squad even in comparison to Real Madrid and Man City.
(1) With the above, we have 4 very defensive minded players to shut down and pocket any forwards in the Europe:
> Casemiro, Martinez, Varane and KMJ
(2) We have 3 very fast paced defenders to beat the likes of Haaland, Salah and Son Heung Min:
>Wan-Bissaka, KMJ and Martinez
(3) We have 4 very fast recovery defensive players:
KMJ, Mount, Casemiro and Martinez
(4) We have 3 goal scoring players:
> Kane, Rashford and B.Fernandez
(5) We have 2 - 3 very creative players for assists:
> Kane and B.Fernandez/ Eriksen
(6) We have 3 huge defensive physical presence:
> KMJ, Varane and Casemiro
(7) We have one very good attacking physical presence:
> Kane (or Højlund)
(8) We have 2 fast paced attacking minded players (wingforward/ wingback):
> Wan-Bissaka and Rashford
(9) We have 2 binding players:
> Mount ans Casemiro
This by far is the most viable tactical formation for ETH and us; And arguably is far better than playing two CBs at the back with one CB sitting on the bench whilst fit.