Babylonia (7th Singularity): Abandoned City Babylon (Free Quest) is the best AP-saving & time-saving location to farm Yggdrasil Seed. You'll get around 5x Yggdrasil Seed by spending 200 AP.
Orleans (1st Singularity): Jula (Free Quest) is the first location you unlock to farm Yggdrasil Seed.
5 Star Servants Tier List: Best Servants [5★]
Best Servants [★4]: 4 Star Tier List
1-3 Star Servants Tier List
Valentine event: Chocolate Lady's Commotion [US 2018]
Nero Claudius (Bride)
FGO Reroll Tier List
Jack the Ripper
Talk on the Heated Sands
Street Choco Maid
Kitchen ☆ Patissiere
Holy Night Supper