Rhodeia's Rage event gives 5 more friendship exp than 2 leylines/domains! Grind now for easy friendship exp and character exp materials ;D : r/Genshin_Impact
Locations where you can easily farm Companionship EXP Genshin Impact | HoYoLAB
Genshin Impact | Friendship Level - How To Raise & Increase - GameWith
Genshin Impact: Trick to get 100+ Companionship EXP every day without spending Resin
Small tutorial on how to farm Friendship EXP : r/Genshin_Impact
How to Increase Friendship Level | Companionship EXP | Genshin Impact|Game8