This B team has some feckin great talents that haven't looked good this season, mainly down to sticking with a bad coach too long.
Just look at the difference between Mbacke under Marquez and this season. Night and day.
With that said, I rate Jofre, Olmedo, Pedro Soma and Toni F from yesterday's team who played the most. The big problem they will all face is that we have bigger talents in those positions.
So they will all need a bit of luck, and some creative integrations.
Jofre should be the easiest as LB is a position that he can easily develop well outside of the Barca system on a loan. I'd say he is probably already as good as Alex Valle for example who has managed to start games in Serie A.
Olmedo probably goes to another LaLiga side eventually as there are bigger talents in La Masia. But there is always a chance he could stick around and be the next surprise like Mingueza and Casado.