Blue Marvel blasts everything he has at Thor, Mjolnir redirects that a hundred fold. Bye Maestro. Cheap win but possible.
Seriously though, in character and all that stuff, Blue Marvel and Thor are alk that is needed. Maestro is gonna have a hard time hitting a single person in this fight when he is getting repeatedly speedblitzed by Mjolnir.
I personally think either BM or Thor need to be removed to make it fair.