To JumpRunner and Black_Knight123: it also helps if you put on 2 Shatter Bolts. Once he's down to about 1/2 health, use Shatter Bolt then a powerful attack twice. Then he'll pretty much always heal so you can use subversion and he'll deal himself loads of damage.
More compact 9, has some slight lag so it only completes 98%, but still passes with 181 design score.
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@Kador11: He could've misnamed the Background.as file.
@saberioninja: Have you used the code from page 7 of this tutorial? Make sure you change the values to match your file.