If it was Amelia v Misha they would save Misha as they know she cannot win and is no threat to their remaining acts.

They would not save someone who is a threat to their acts Amelia and who could win.

Therefore it should be no judges vote next week but it will be

They would save Misha because they are ordered to by the producers. Nothing to do with tactics- they will drag Misha to the final above contestants the public actually like.

They know that without Miss B the semi's will be a snoozefest.