Iksars can not wear platemail which in my opinion is a serious drawback for a shadowknight. Dark elves have a high mana pool with less melee penalties than erudites pay. They also feature a very SK friendly home and ultravision which both will come in handy. Beginning Stats There are many useful ways to allocate your starting stats. I will however cover the benefits of each stat really quickly here.
Strength is right up there with intelligence as the two most useful shadowknight abilities.
Strength equals ATK which equals more damage in combat. Strength only affects your maximum damage not your median damage. Some will complain that strength does not increase your maximum damage by enough to make a difference. While this is a valid argument it is still the second most useful skill of a shadowknight. Agility is an important skill because it increases your armor class.