On my opinion assuming Richy is sold, but DCL stays, Keane or Mina leaves (one not both) and Holgate goes
And we retain all major first team players (not including Coleman, Gomes)
Then realistically looking through the squad, we would need the following.
Cover at lb/rb, we have Nkoukou returning this summer from Leige, so rb effectively.
Centre back we need at least one better than we have (mina aside) Sarr from Chelsea as an option. We have Godfrey, Braithwaite who hopefully develop.
We need a 'pivot' midfielder - Gilmour the obvious candidate as he's done it for Lampard before...