I was playing around with Throwing Knives and thought they might work better as something you actually equip in your hands as a weapon, instead of the utility slot. That way, the attacks are more responsive and you don't have to wait for the "throwing" bar to fill up constantly each time you attack. You just toss them until you run out of stacks. You could also use the other hand to equip a different type of throwing knife and switch off between the two hands.
