Any option that doesn’t allow Hermoine to be cleared of all charges to go back to school is not an option
The hidden 7th Option.
Use a false memory charm on a student to generate testimony framing someone else as false memory charming Draco and Hermoine. My favorite path right now it to set up Lord Jugson using the time turner, invisibility cloak, tampering with the wands, and a False memory charm on a student. I go into more detail here http://lesswrong.com/r/discussion/lw/axe/harry_potter_and_the_methods_of_rationality/64am
I’m actually fairly confident in my guess to be honest. I guess we will see in a day.