For me we play 433, we don't have the midfielders technical enough for a 343 & too many wingers for 352.
Godfrey & Tarkowski should be first choice then we have Keane (I'd get rid but no interest) Mina (best defender but I'd get shot off due to ridiculous injury record) Holgate (realistically think we could get a decent fee for him) & Branthwaite (I would keep as the first choice rotation for the centre Half's) not sure what will happen with the fullbacks but a pre season for Patterson & Nkounkou can only be a good thing.
Allan, Iwobi, Doucoure & Dele all should fight it out for the 2 attacking positions in a 433, Davies backup for defensive mid, get rid of Gbamin (injury's) Gomes (crab) bring in a holding midfielder that's mobile and can pass with both feet Mathias Normann (would be very cheap and was pretty good, if you watch him you can see he would be perfect for a 433 & for us with our lack of funds)
Forward line needs the most work in my opinion, we have no goals and we are looking at bargains clearly. Townsend isn't available until 2023 so we have Gordon & Gray as wingers, both best on the left.
I'd go for Reiss Nelson on the right who would be very cheap, last year of contract at Arsenal, very fast and more of a playmaker than an out and out wideman & then another for the right maybe Chukwueze who's in the last year of contract too & Lampard has been interested since being at Chelsea.
Calvert-Lewin & Rondon isn't enough, I'd get rid of Rondon, bring Pukki in for a nominal fee who has great movement and is a good Prem goalscorer & then get another, a young punt for somewhere around Europe. Would love us to go for Beto of Udinese but he is out our price range.
May not be sexy superstar names but all they are reliable players that are realistic.
Also see how Simms & Onyango play in the league