7th Singularity Babylonia: Cutah free quest is the best AP-saving & time-saving location to farm Ghost Lantern. You'll get around 3-4x Ghost Lantern by spending 210AP.
2nd Singularity: Mt. Etna free quest is the first location you unlock to farm Ghost Lantern.
Rashoumon event (Ibaraki Douji event)
Murder at the Kogetsukan
Inheritance of Glory
FGO Reroll Tier List [5/11 updated!]
Device Transfer Guide
How to farm EXP cards & level fast
Best Craft Essence: Craft Essence Tier List
Talon of Chaos (Claw of Chaos)
Glassful Sweet Time (Glass Full Sweet Time)
Minamoto no Yorimitsu (Berserker)
Mysterious Heroine X (Assassin)