I don't think we'll sign 3 CBs to be honest. I think De Ligt seems the most straightforward, and Yoro will depend on what Madrid decide to do. If that falls through then maybe we go in higher for Branthwaite. So, at best, I think we sign 2.
Lindelof is definitely going I think, and if we get 2 then I think Maguire will go too. If we don't then I think he stays as the 3rd CB. I'm both situations I think Kambwala can be your 4th, and you can keep Evans for a 5th and his experience in the dressing room.
Given we'll be in the Europa League he could still end up playing a good amount of games this season, then you re-evaluate next summer. At the very least maybe you get a good price for him if he puts in decent performances, but obviously isn't good enough to be first choice one day.
If they don't think he'll play at all then they should loan him out this season.