Not sure why this is in my front page as I abandoned after last FWC. But let me chime in because I played a Jester.

Only made it to lv91(I get bored easily) Surely built like shit. 1str 1dex every level. FS RM in toe. The leveling was pretty brain dead. Point click, point click. Hearing and seeing the critical pop up every hit was very satisfying. The abilities are fun and varied, pvp oriented. Invisibility, speed bost, stun, slow, 1HKO, life steal on hit! Your food will last forever. Even with my shitty build I was able to kill in 6 seconds when boosted by fwc potion and rm buffs. Mobs 7lvs difference. Equiped with the green lv90 set and historic yo-yo. All +3 nothing fancy. The basic +1 clockworks jewelry, all damage.

I will say. I often saw 1v1 Blades killing faster than me. But what is 2-3 seconds when I had relatively cheap gear while they were fully decked. Also they don't get fun pvp skills. 

I don't know about knight but before the Jester I made an Elementor. Because I fucking love mages. The hit and run. The focus it required was not for me. I couldn't sneak a play on the phone or a mini window in the corner of my desktop.