Sub-Singularity I Shinjuku: Shinjuku 2-Choume free quest is the best AP & time saving location to farm Forbidden Page. You'll get about 3x Forbidden Page by spending 210AP.
4th Singularity London: Hyde Park is a location where you can farm both Forbidden Page and Evil Bone.
Here is a list of servants that need Forbidden Page to perform Ascension and Skill Up.
Note: No Bond CE's here.
5 Star Servants Tier List
Best Servants [★4]
Christmas event [JP 2016 Rerun]
FGO Reroll Tier List
Holy Night Supper
Piece of Year 2030