Reforge your items into dust, to buy equipment you need.
Visit Adventurers' Guild by clicking on the Adventurers' Stone located in thais temple:
Go to +0 level and navigate to the teleport on south:
You will find multiple npc's resembling each item category:
You can sell your items for dust resmbling item category:
And then buy an item from the same category for higher price
This way you can equip your character faster without droping the actual item you need