In your equip window, there are 7-8 equip options that are uncommonly used, 4 of the options being rings.

If you have NX, you got the ring part covered and Pet HP/MP.

If you do the event quests from the monk, you got the medal covered.

You also get the eye accuracy and face accessory (most) from Gachapon.

Where are the belts, and WHY do face accessories go to the forehead section if they actually go to your mouth?