GK:
Leno - stay
Runarsson - gone
RB:
Bellerin - gone
Cedric - probably stays but don't care
Chambers - stays
LB:
Tierney - stays
CB:
Gabriel - stays
Holding - stays
Mari - stays
Saliba - comes back
Mavropanos - gone
CM/CAM:
Partey - stays
Elneny - goes
ESR - stays
Xhaka - stays
Maitland-Niles - goes
Willock - hope he stays
Guendouzi - goes
Wings:
Saka - stays forever please
Willian - goes
Pepe - stays
Nelson - loan
Martinelli - stays
FW:
Laca - goes
Auba - stays
Nketiah - goes
Add in Balogun
Probably gone:
Kola
Torreira
Therefore we need - backup GK (Ryan again?), Left back, CM and CAM. Maybe a new RB if we sell Chambers and/or Cedric.
If we want 2 players for each position
GK - Leno, ??
RB - Chambers, Cedric (appears a bit weak)
LB - Tierney, ??
RCB - Saliba, Holding
LCB - Mari, Gabriel
CM - Partey, Xhaka, Willock, ?? maybe Azeez, although more likely a loan. Or maybe AMN stays as a handy utility player for CM and RB.
CAM - ESR, ??
LF - Saka, Martinelli
RF - Pepe, ??
CF - Auba, Balogun
So maybe keep Nelson as well, although Arteta doesn't seem to rate him. I think he's still best out on loan. Get in Odegaard or Buendia and the forward line is set.