Good MS class?

I know theirs a thread about this already but idk what an assasin is? I'm an explorer and it's telling me to make a choice on mage, archer, thief, warrior, pirate and whatever i didn't mention. Which one should i be? I know people will say their all equal they have their pro's and con's but i want to know which would be fun, easy leveling, and can kill. If their isn't one what would be fun?

If you are new to the game i suggest you to be a Cygnus night~Blaze Wizard cool attacks, easy to play as, fun as hell and easy leveling (especially when you get your 2nd job)
Or else you could just try out all the classes.. It's boring but it will give you a good advantage of what class you should choose..