Camelot : Wastelands of Death (Free Quest) is the best AP-saving & time-saving location to farm Chain of the Fool. You'll get around 6x Chain of the Fool by spending 190 AP.
Rashoumon event (Ibaraki Douji event)
Murder at the Kogetsukan
Inheritance of Glory
Piece of Year 2030 (A Fragment of 2030)
1-3 Star Servants Tier List
Fate Grand Order Farming Items
Jewel Sword Zelretch
3rd Singularity: Okeanos
Golden Catches a Carp
Ereshkigal
Arthur Pendragon(Prototype)
Gorgon
Black Holy Grail (The Black Grail)