Helpless!
I didn't like like this episode but I loved him because it's a strong episode. Surprise has also something very strong but Helpless has something I just can't describe. You really feel for her, you think "Damned, she turned 18, she already died once, her boyfriend turned bad after she gave him her everything, she had to kill him, was fired from school, mummy issues, but came back anyway, kept on fighting and the Council still think it's necessary for her to pass that test? And it's not even sure she'll win, she has a misogynistic crazy vampire after her and he has her mom in hostage and she is powerless and couldn't even count on her watcher".
The fact that at that point she kept slaying till season 7 makes her a real hero, after all she's been trough while only 18, she doesn't let her duty down.
18 was the year she started becoming really more than a Slayer, she becomes more and more like the Supreme Slayer (I think she reached an apogy at the end of season 5).