That's what allows her to precisely target body parts when aiming, but she still needs to actually aim herself.

Unfortunately her speed of 8 meant she wasn't fast enough to act quicker than Arton with his speed of 3, so he managed to take out the undead soldier she fired at before her arrow could hit it, leaving the arrow flying towards Rio instead. I take it that this was due to the number of things she was doing simultaneously ([i]Light Step[/i] to launch into the air, aiming, channelling mana, launching arrow compared to just swinging a sword.)