Is that something to do with the HM version? ^^ - I know theres a nail thing you have to DPS half way through. last time I did it I couldn't really get to it without facing him in the direction of other players, but DPS seemed high enough!
Ah, that's the word I was looking for! Nails, not Javelins I've only done it as a healer, but it seems that no matter how many times the Tank and I told the DPS to prioritise destroying them, they'd still just focus on the boss "for deeps" and we wiped so, so, so many times.