Jester Set

What is the purpose of the Jester set?

 

To make you laugh at how bad for xp it is and how good it is for raw spell dmg builds

 

with 4 items, you'll have -100% xp from the set bonus. (There's a 'secret 4-piece bonus that gives -100xp and loot but is similair to three pieces in every other way.)
but each item individually will can give you 33% exp bonus.
Meaning that you can get +32% xp bonus. when wearing full jester. Not that terrible for xp, if I may say so.

As for the main thread:
https://wiki.wynncraft.com/index.php?title=Jester_Set

Look at those stats. They're pretty great if you ask me.

I personally really like using two of the rings, it'll still give a two piece bonus. Even if it doesn't say it does. That gives me +150 raw melee damage, quite some life steal and xp/loot.
Use that on a super fast attacking weapon. It's great for around the level of the rings.

Than the 3-piece set is good for spells. Seems pretty useful to me.

 

If you keep anything with 25+ on the loot and XP bonuses they can be useful, on their own. But like the @creature said, different #'s of items give different set bonuses that cater to one type of build over the other. Kinda like the clock set.

-DavicusPrime