Can I ask how would you like a Jester to play?
Thats the best part about Jester. You could do anything. Look at the Jester in Gauntlet Dark Legacy to see a good example. You would be completely free creatively. This isn't the case with any other class.
Maybe an AoE ranged attack for Up arrow (weak).
First Skill could be an attack speed buff (for just the Jester) maybe
Second Skill could be a Decoy (to help with solo play)
Third Skill maybe he creates clones on the side of him to aid in damage and general enemy control
Perhaps he starts off abit weaker in terms of HP, Mana, Armor but moves much faster compared to other classes. I'm just throwin shit out here because you asked how he would play.