took some time but worked just fine for me spamming this. RNGesus will hear your prayers eventually.It took me about 170 Energy to gain the Knowledge

still not worth, the best i got with maxed buffs was 22 amity, and every time he asks for minimum or accumulated favor you just can't get success, so just spam F5, it's actually cheapier that conversation for this npc

OP vianori
Если махать под бафом
1) Зелья крепкой дружбы +30%,
2) Соленой рыбой +5% и
3) костюмом (не шута) +10%,
то вы получите +4 дружбы за 3 энергии

vvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvv
If Waving, do so while buffed
1) Improved Elixer of Amity +30%,
2) pickled fish +5% and
3) Calpheon Noble Suit/Dress +15%,
and you will get +4 Amity per 3 energy
^^^^^^^^^^^^^^^^^^^^^^^^^^^
{Translator's Opinion ^this is the best method^}

Sparking Interest

- Will of Elion
- Birth of Faith
- Evil Gods in Darkness
- Dragon Watcher
- Tower of Will

3 successes = ~67 Amity but how often you fail is not worth it "just smile and wave boys" (F5 like vianori advised)

KNOWLEDGE:
Ethnicity I / Ethnicity l / Ethnicity 1

Imps (Can be obtained through [Amity]Bjorn) https://bdocodex.com/cn/theme/6645/