He isn't a winger, he is a striker or second striker or false9, therefore he should be played centrally.
Winger needs to help team during buildup and keep possession and stuff like that, Marmoush doesn't have those skills, he is forward. it's like playing Haaland LW.
if we want to play them together (Haaland and Marmoush), we need to stop playing 4-3-3 and move back to 3-5-2, which I think suits best our current players and talent we have..
For example
--------------Ederson-------------------
-----John-----Ruben----Gvardiol-----
Nunes--Rodri-----Reijnders----Savio/Ait-Nouri
----------------Foden/Cherki-----------
--------Haaland---------Marmoush-----
4-3-3 needs better wingers and fullbacks, which we don't have, but we have good wingbacks (Nunes, Savio, Ait-Nouri, Oreilly), good centre-backs, a lot of midfielders..
We don't have luxury to play light and exciting football. We need to be heavy and pragmatic and use our best players.
I don't want tactics that suit Doku, I want tactics that suit Marmoush, because Marmoush can score more goals than Doku and therefore that's smart choice.
I don't even give a fuck Doku plays for this team or not. But Marmoush scored some goals and showed potential, that should be nurtured.