Ryazan
Smash Ace
I didn't find this in the Compendium, and it is probably not common knowledge. But while practicing arrow loop variations in training mode I discovered that the longer an arrow is held, the more damaging it becomes. It does not appear to have a significant change in knockback, but a fully-charged (held until auto-release) arrow will deal approximately 11% as opposed to the uncharged 5%. I am, once again, unable to make a video, but it's very easy to verify this on your own. If it's not already widely known, it's a nice find because in addition to being fast, maneuverable, and spammable, it is also the fastest-charging chargeable projectile in the game.