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
Best Craft Essence: Craft Essence Tier List
5 Star Servants Tier List: Best Servants [5/9 updated!]
How to farm EXP cards & level fast
Mordred (Saber)
Minamoto No Yorimitsu (Lancer, Summer 2017)
Altria Pendragon (Lily)
Miyamoto Musashi
Minamoto no Yorimitsu (Berserker)
Billy the Kid
Cu Chulainn (Alter, Berserker)
Triumph of the Lord Impaler
Millenium Yggdrasil (Golden Millennium Tree)