I've yet to find any use for my Necrocasm that another weapon would not be better suited. NLB is great for PvP. It is my go-to sniper for the Crucible's Longshot Bounty. SGA is awesome for Oracles when fighting Atheon in the VoG. Universal Remote is nice to have when farming Glimmer at the Gatekeeper CP in the VoG. Two equipped shotguns are better than one. I don't know about 4th Horseman since I play on an Xbox console.