Question: what are the best enchantments for a sword?
Answer: Sweeping Edge (Highest level: III)
Fire Aspect (Highest level: II)
Smite (Highest level: V)
Knockback (Highest level: II)
Sharpness (Highest level: V)
Looting (Highest Level: III)
Unbreaking Highest Level: III)
Mending.