How about this, 1 star player and 1 youth player in each position whilst keeping it realistic and affordable:
Forward: Torres/Dzeko (on loan), Gabbiadini (5M)
Midfielders: Asamoah (15M), Verratti (6M)
Defenders: Samuel (free), Ogbonna (12M), Caceres (8M)
Goalkeeper: Leali (?)
Total: 46M