Not to mention we have to purchase Raya (or shell out another big fee for a No1) and a No2 keeper. Rambo's gone for sure, as likely are a few Hale End products (Eddie, Reiss, and sadly ESR... man, I'll be sad to see him go) to raise funds since they're pure profit. Maybe move on from Fabio Vieira, too. As for Partey... these past two matches have shown just what he brings when healthy; he's Jorginho and Rice rolled into one. The best ability is availability, and he usually doesn't have great availability. A replacement will run us around 60m or higher.
Arteta has eight guys he will start even if they're bleeding from the mouth and both legs are falling off, maybe three others he'll use in situational/sub roles, and pretty much the rest don't play. That's 11 guys he trusts, and thus burns them into the ground. That number needs to be around 14-15 if we are to seriously compete for the PL title and play in the latter stages of the CL.