Quote Originally Posted by Alzelia View Post
I'm currently using a mage's Choker but I am definitely going to switch to a spinel choker. The mages choker gives 15 accuracy, while a Spinel Choker +1 gives 10 magic attack, and 25 lightning potency. For all lightning based spells, you are getting a total of +35 magic attack with the Spinel Choker. For that one slot that is a very large amount of magic attack, more than 2 IV materia worth, while the mage's choker only gives a single IV materia worth of accuracy.

The mage's choker does add mag crit rate though, but I'm not sure how useful that stat is.
If you need to switch to some magic acc gear then Mage's Choker should be the first thing you equip. As the guy above said Spinel+1 does nothing for Thundara (a massive source of your damage against boss mobs) due to the way it is calculated.