I think ideally I'd have 5 bottles with fairies, a shield, a quiver, and a bomb bag. Right now though I have 3 bottles, the goddess shield, a life medal, a heart medal (I'm on hero mode), a treasure medal, and a potion medal (this one is just in there because I haven't gone to the item check yet).
I carried the shield, quiver, satchel, bag and four bottles for fairies/potions. For the final boss, I was expecting it to be hard (which it was) but I went too easy on myself and replaced my quiver, bag and satchel with the two life medals and potion medal. I had two heart potion++, a guardian potion and a guardian potion+. I went too easy on myself with all the potions, it was barely challenging because of it