So I got the Last Word from a legendary engram yesterday, and today I got the exotic bounties for Bad Juju, Thorn, and Invective. Bad Juju is out of the picture, as I rarely use pulse rifles. Now I'm having a hard time choosing between Thorn and Invective. Is Thorn as good as the Last Word when fully upgraded? Or should I go with Invective for PvP scenarios? Also, does invective regen ammo directly to the current mag, or just into the reserve ammo? Tldr; Already have Last Word, should I get Thorn or Invective?