Essential CE for farming friend points, can be equipped on any servant preferably in the backline because it has no effects other than increasing the friend points received to 75.
Note: No Bond CE's here.
5 Star Servants Tier List
FGO Reroll Tier List
Best Servants [★4]
Minamoto No Yorimitsu (Lancer, Summer 2017)
Altria Pendragon (Lancer Alter)
Fate GUDAGUDA Order
Black Holy Grail (The Black Grail)