Knights can use two different kinds of weapons. It depends upon the player what to use. If you want to use both weapon efficiently, you need to focus more on the tree stats of your character. The Strength (str), the Dexterity (Dex) and the sensibility (Sen).
At your starting level you need to make your str to go at least 50 and then start adding stats to your dex so all the bow attack damages will increase… Try maintaining your str higher than your dex.
Add some to your con so your attack accuracy will turn higher.
One important thing to remember when building a knight in aruarose is that when you are at level 160 and above it’s a must to make your sen level 200. With this you will have 95% chance for your critical attack.