Missing from your list:
Make Draco testify to his crime; use the newly won blood debt to save Hermione (or stall—see my reply to Daniel_Starr: http://lesswrong.com/r/discussion/lw/axe/harry_potter_and_the_methods_of_rationality/63rw)
Missing from your list:
Make Draco testify to his crime; use the newly won blood debt to save Hermione (or stall—see my reply to Daniel_Starr: http://lesswrong.com/r/discussion/lw/axe/harry_potter_and_the_methods_of_rationality/63rw)