Some of you may think throwing-knives would be too similar to throwing-axes, but if they are how I suggest they probably wouldn't be very similar at all. I'd suggest that these would be a rapidly thrown item hat stacks up to 16. They could have a very short drawback time and deal a little less than a shot from a normal arrow. I don't know what sort of hirable npcs would use these, but perhaps Dunedain would be a suitable choice as they are in desperate need of diversity. Perhaps they would be a "Dunedain Blade-Master" and use swords when close as well as the knives from a distance. Perhaps they would also wear another kind of armour, such as a slightly heavier armour that's made with more iron than the current Dunedain armour, but still use leather to keep them in a cloak-like armour (or perhaps steal the recipe of the current Dunedain armour, and the original Dunedain armour would only use, say, one iron ingot per equipment piece).