In other words, I think that if you're leveling up a pure Elf Avenger with all the racial skills, Chaos is the only viable option!
If you do take Light, you need to forget about Enchanted Arrow and Arrow Storm.
I know about Divine Retribution (Enchanted Arrow - Divine Retribution - Arrow Storm), but there's a problem here too.
So, should you choose Blood Enemies and not attack them? Wait for them to kill you, and then use Divine Retribution on them? That doesn't sound very convincing.