Question: what are the best enchantments?
Answer: Silk Touch.
Looting. ... 
Unbreaking. ... 
Fire Aspect. ... 
Sharpness. ... 
Multishot. ... 
Lure. Sometimes you just want to put the sword away, take off your armor and sit by the sea with your fishing rod. ... 
Loyalty. Specific to the Trident, this enchantment returns the Trident after throwing it. ...