Mage only items that you have to buy
 

Looking for mage only droppable items that are fun to have. Money is no object. Lmk

You might want to check the Sol Ro Temple quests:

Clay Bracelet

It takes longer to travel to and from OoT & RM than to get the items themselves off the mobs.

Earthen Boots

Don't forget the focus items of course,

And there is also this one, but the casting time is really very long:

Burnt_Wood_Staff