Personally, I would pick the Fatebringer mainly due to its amazing perks and the fact thats its a legendary which means I can equip a more useful weapon as a exotic such as an Ice Breaker or something.
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I love thorn but it just doesn't feel nice. I like the last word but it feels like it doesn't have much punch but is fine on a hunter as you can reload really fast. Never used hawkmoon. Never used word of crota. Used fate bringer on a friends account liked it but it's not 331. Red hand ix is my fave with explosive rounds/armour piercing/extended mag, reload upgrade, perfect balance.