Start Giles and Bagley immediately. We need to get serious about winning. Playing both of them bigger minutes immediately improves our two biggest problems: rebounding and interior defense, while sacrificing nothing, but only adding more post scoring.
I get that you don't just supplant starters and there's a locker room dynamic... blah blah blah.. on sheer talent and merit... start Giles and Bagley immediately. Plus, their legs are fresher and they can run us through the last 31 games.