These are what we call the 'YMMV items.' Things that some people find in this work. We call them 'your mileage might vary' because not everyone sees these things in the same way. This starts discussions in the trope lists, a thing we don't want. Please use the discussion page if you'd like to discuss any of these items.
Game Breaker: The Psykeepers have a skill called Satanology, which stops any enemy in their tracks for several seconds, with bonus time for the Intelligence stat. The skill has a cooldown of 30 sec. However, if your Intelligence allows you to extend the effect time beyond 30 seconds, that and a supply of MP potions will totally destroy anything!
Even then, the skill only has an approximately 80+% chance of succeeding. If you failed to stun, goodbye!
Not true anymore, Satanology has no cooldown, so you can just keep spamming it to keep the monster in place once it starts running out.
Bow Jesters. A more than obscene critical rate and perfect accuracy mean that even bosses and Giants have trouble reaching them as each Critical Hit knocks the target back a good distance. Flame Wars ensue each time anyone questions their presence, though, so forum members don't bring it up very often.
This is no longer true. Bow jesters don't get knockbacks anymore as of version 9, if I remember right. Of course, this troper played a ranger and believes that bow jesters are complete and utter blasphemy, so he has no right to talk according to people who play bow jesters. Of course, they still kill enemies so quickly that they could hand them their head on a platter and the monster would accept it because they forgot to die.
And bow jesters are now used mainly as a leveling build for yoyo jesters, as they're easier to level but do much less damage due to their endgame gear being mid-level instead of high-level.