This is a really dorky and probably awful build idea, but it seems to me there are enough "dagger throw" style SLA's in the game available now that you might be able to make a character that just uses them. You'd want:
Harper: Throat Dagger (23 points)
Vistani: Fan of Knives (12 points)
Feydark Illusionist: Fan of Shadowblades (23 points)
Assassin: Shadow Dagger (13 points)
Shiradi Champion: Wild Shots
Shadowdancer: Shadow Lance (although the cooldown on that one is AWFUL)
Knife rune arm
Spirit Blades epic feat
Are there any I missed that can be squished in there? I suppose you could use some from the Grandmaster of Flowers destiny if you were so inclined.