Cassi | Narcissa
This was why you were (and are) my favorite Aunt. I quite agree with you and have tried to use that to my advantage as well.
Yes, Lucius wouldn't mind at all. I'm sure he would agree in preserving the mind of Arcturus while we're here and will know exactly what we should focus on with him. He's a very good tutor.
Arcturus may have spoken with him already so it is out of our hands. As you said, we only need him for his medical expertise if something were to go wrong.
I will have to ask him. Have you ever tried that form of magic?