Lukas the Trickster by Josh Reynolds. The story follows a space wolf maverick, Lukas, as his planet is the victim of a real space raid by Duke Sliscus. They are good foils and you will get chapters from each perspective. Sadly not too many stories with Dark Eldar protagonists you have to get used to seeing them as the "bad guys".
Bear me thither so that my blade might taste of their flesh.