Heres my rebuild
1) Id sign that guy from Villareal, Alex Baena.
Dude has elite goal creation numbers from LW.
Baena, Doku LW
Bobb, Savio RW
That looks really good to me. The academy also recently is producing some top talent (once again), no reason we cant have some 3rd choice wingers from there.
2) Grealish, Nunes, O Reilly, and Lewis to be molded and play more as the #8 while Gundogan, Kovacic and Bernie leave.
Thats still 4 players for 1 spot, but all 4 could also play elsewhere in a pinch. Even still could probably sell one of them easily.
Also Divine Mukasa from the academy looks a future star, as Grealishs contract runs down id integrate him as an 8/10.
3) Buy Jonathan David to rotate for Haaland and Foden. Can play with a striker or as the striker, and his price looks cheap.
4) Buy a very defensive CDM to rotate with Rodri (Gvardiol inverts from LB), and you can play both (if we have to) by having
1) Rodri partner the CDM as normal, but having a fullback push up (new player).
2) Rodri starts as a CB and pushes into midfield.
This player, id go for Ederson or Baleba, both have shown really good defensive instincts and can easily play with Rodri as well.
Id also use Jacob Wright as a 3rd choice CDM and 3rd choice RB (inverted).
4) Then to finish the rebuild, we would need atleast 3 defenders for now after selling Walker, and moving Lewis to as a backup 8.
Robinson (attacking LB) to play if Rodri partners the CDM, otherwise Gvardiol LB by default to invert.
Or Livramento is my alternative to Robinson as an attacking RB.
I dont care which, both are class, we only need one of them.
Juma Bah AND Ousmane Diomande as a RCB and RB respectively. Honestly this could be most talented defenders, as long as they are fit.
Calum Doyle brought back to be an understudy to Ake (who will need a replacement at some point).
Gvardiol, Robinson LB
Ake, Doyle LCB
Dias, Bah RCB
Akanji, Diomande RB (always becomes part of back 3).
Stones... if we can sell him sure do it, I simply dont think we can, so keep him and make him a back up.
That would be my start to the rebuild, buy 6 players and the 7th is a loanee.
Last 2 things, id use the buyback on Delap (more options up front) and Harwood Bellis (if we sell Stones or even if not who cares, hes a good backup).
Those 9 in total would complete the rebuild.