S3 to cooldown > S1 to +5 fighting spirit > Optional: Max the rest for damage if you have resources.
My Preferred Sets: Speed + Crit / Speed + Hp
Necklace: Crit damage / Crit chance / HP %
Ring: HP % ring
Boots: Speed boots with Crit chance, Crit damage, and Health % substats
Uses: Ken is usually mainly used in guild wars now, but alternatively he is also very strong in PVE content like Golem 11 and Raids.