Drive by recommendation

One of the very, very best Snape Draco 7th year fics I've every read. It has (and imperfectly addresses) the expected power imbalance. Fantastic writing. Great development of the Slytherin 7th years as minor characters. This kind of thing is why I probably will never leave HP fandom.

http://hds-beltane.dreamwidth.org/144247.html