I have a:
Lv 120 Blaze Wizard
- At first it was just basic lving as a regular Magician But once you reach lv 35+ you will then start to lv up fast because of the New mobing skill called: Fire Pillar. It Took me awhile to get BW lved up since I had to wait untill I'm strong enough to kill the next Elemental Monster ^_^.
The rating for this class in my opinion is lving Patiently.
Lv 115 Dawn Warrior
- The Dawn Warrior is a Typical Regular Warrior in the beginning, but once you you have reached the next job you will be lving up to 70 & then lv 120 in no time due to getting earlier & new skills & It's the best AOE Class (Best to train where you can mob monster's)
This Class is 2/3 of my Favorite Because of the early & new Mobing Skills.
Lv 60 Night Walker
- I'm Currently Working on this acc. mainly & overall if you like to do High Accuracy & Dmg & Like to have Awesome Skills then have a shot at NW ^_^ here's my opinion of the Pro's & Con's:
Pros: Doing Massive Dmg & Early AoE skills at 2nd job, Pretty easy to lv up & Useful in some PQ's. Venom is very useful when training at 3rd job ^_^.
Cons: They Depend on att pots & buffs, They are expensive due to getting higher lv star's & last but not least They aren't very good Mob'ers & Advoid. is low (meaning you will recieve more dmg then reg assassin's.)
Wind Archer
I don't like The Wind Archer because it seems to lv up very slow.
Thunder Breaker
I have not tried to Make this type of KoC yet, but I'll get my way around it later on. ^_^
Overall: I reconmend Making a Night Walker (Funded Player's Mainly)
Dawn Warrior, for fast lving & Don't depend on pot to kill monsters quickly due to the skills.
Blaze Wizzard, Good for Aoe Mobbing & The job best fit for those who don't like to spend alot of $$ (Mesos)

Hi Call me Tak ^_^ or The Matt Attack from bera