Question: what boss weapons are worth it dark souls 3?
Answer: Farron Greatsword. How to get: Craft via Soul Transposition with the Soul of the Blood of the Wolf, which you get after defeating the Abyss Watchers. ... 
Dark Sword. ... 
Black Knight Greataxe. ... 
Estoc. ... 
Moonlight Greatsword. ... 
Long Sword. ... 
Fume Ultra Greatsword. ... 
Yhorm's Great Machete.