Dragons are pretty easy with a decent bow & arrow at any level, the only thing that makes them difficult is the fact that they don't stay still for long, I don't worry at all about coming up against them. What I do worry about is the human enemies, I'm at level 34 and most of them are at Marauder class or above and can be rock hard to beat even when they're on their own. The Dragons are total pussies compared to normal enemy.