I find it too limited that you could only shoot one arrow at the time, that you have to wait 1 cooldown before you could shoot another one. That is quite a drawback for a bow, while a sword gives you the ability to continue to fight the whole time. Okay I know spells on swords have a cooldown too but a bow needs an arrow, sword fighting doesn't immediately need a spell.
Is it maybe an option to allow for example three arrows per post (or any other amount) or give a quiver with a standard set of arrows which has either a cooldown before it's full again or you have to refill using mana (and cooldown). The mana based on the strength of the bow, so D-ranks quivers have another amount of arrows and a small amount of mana to fill up, A-rank bows have a bigger quiver and takes more mana to fill. I don't have an exact amount or mana set in mind, but just the idea of not depending completely on one arrow for one post and not being able to do anything the next post with your bow etc.
Especially with the Ranger Set, it is asking for trouble if you want to get the bonus yet your bow works with one arrow and not the next post. Nice to dodge but I would like to fight too.
It could also be an option to make a quiver a backpiece/relic to reduce cooldowns.
Please consider!