It states that you're a Swordsman, so maybe if you can try to have the seven other classes, and then find out what is suitable for you. What might work on one person might not necessarily work on another.
Other than that, I'd say Priest.
IGN: EternalLifeI like green.
No one can change the past.
The only thing we can do is strive to make up for our mistakes.
Why must we make up for our mistakes, you ask?
Because in so doing...we can find the way back to our path.
And once we've found our path we can move on from our past mistakes toward a brighter future.
As quoted by Ace Attorney Phoenix Wright.
Trying out all 8 classes takes a while because you can't really get a feel for them until your at like lv 24 or something. But you can always try that, which is what I'm doing haha. In my opinion though, I think Elementalists are pretty beast at solo-ing and AXE mercs and Swordmasters are OP in pvp =). And yea, going with the above, it all depends on your play style. I happen to suck ass at swordmasters but can own with long range classes.
EDIT: By the way, there isn't one class that is better than others. It's actually more balanced than say MapleStory. Especially in pvp, its all about skill mostly.
Courtesy of my freshman Intro to Business class =)