Possible builds
STR-STA - pvp
DEX-STR-STA - pvm

STR = damage
STA = HP, DEF, FP
DEX = accu, aspd, eva, crit rate
INT = MP (useless for yoyo jester)

BUILD DISCUSSION:

[STR-STA]
PROs
Extremely strong in the arena.

CONs
Snitch
slow to lvl.
expensive to use.

EQUIPMENT
Jester Armor

PRIMARY SKILLS TO LVL:
Crossline [lvl 30 skill] - main attack skill
Enchant Poison [lvl 60 skill]
BackStep / Backstab [lvl 70 skill]
Hit of Penya/HoP [lvl 75 skill]
Vital / Fatal Stab [lvl 80 skill]

OPTIONAL SKILLS TO LVL:
Yoyo Mastery [lvl 20 skill] - slight increase in damage.
Dark Illusion [lvl 30 skill] - a must for PVP.
Perfect Block [lvl 40 skill] - additional defense.

EXPLANATION OF THE BUILD:
tThe skill spammer half of the jester, STR-STA Jesters spam crossline to lvl. Weak damage but has the ability to stun lock the opponent. Once you reach lvl 75 you have the option to use one of the best attack skill in flyff - Hit Of Penya. Be warned though, Hit of Penya consumes penya equal to the maximum damage of this skill to the opponent.

Build suggestions: (follow at your own risk)
40 STA
rest STR

THINGS to REMEMBER:
different STUNS dont stack!
VitalStab and SNITCH needs you to be in DarkIllusion state to activate.

[DEX>STR>STA]
PROs
Decent lvling
Possibly has the best CRIT rate in the game (because of Critical Swing)

CONs
Snitch
relies heavily on stun in the arena.
RM dependent.
annoying KB

EQUIPMENT
Cruiser / Hyper Suit

PRIMARY SKILLS TO LVL:
Critical Swing [lvl 65 skill]
Yoyo Mastery [lvl 20 skill] - decent increase in damage.
Enchant Poison [lvl 60 skill]
Perfect Block [lvl 40 skill]

OPTIONAL SKILLS TO LVL:
Crossline [lvl 30 skill] - for PVP
Backstab/Backstep [lvl 70 skill] - for PVP
Hit of Penya/HoP [lvl 75 skill] - for PVP
Vital / Fatal Stab [lvl 80 skill] - for PVP
Dark Illusion [lvl 30 skill] - for PVP

EXPLANATION OF THE BUILD:
the Crit type Jester, probably has the best crit rate in the game, it relies on normal/critical hits to lvl(some attack skills occasionally). Upon becoming a jester you will automatically be blessed with an innate ability to Crit 4x more than other classes. At lvl 65 you will learn a skill that dramatically increases your crit rate. because of the yoyos low base damage, Crit type jesters need the lvl 45 set to amplify its damage(critical hits).

Build suggestions: (follow at your own risk)
80-100 dex
30-40 sta
xxx - str

Things to REMEMBER:
To be safe, do not go beyond 130 base dex.
Enchants dont Stack!

Fly For Hero Yoyo Jester Build(FFHYJB)
15 dex
15 sta
xxx - str

This is the best ONLY for FFH since Web Buffs Is Applied...