But seriously, the difference between Fire and Ice Necklaces, is the main reason I chose to play Fire. Crystallize freezes an enemy for 30 secs, but if you attack they instantly unfreeze... if you freeze an enemy and sit there waiting for 10 secs, then it reduces their Armor/Magic resist. Seriously?! Who wants a freeze effect that requires you to wait for 10 secs, in order to get nothing but a debuff?
Want to know what necklace is worse? Nothing. There is nothing worse. This is even the worst version, even worse than Distract or Rebuke (each of which have faster casting speed and debuf for a greater amount). Ice wiz get the messy end of every stick.