Depends what you're doing (Destiny)

by someotherguy, Hertfordshire, England, Tuesday, July 21, 2015, 10:32 (3513 days ago) @ Vortech

Third Eye is thoroughly mediocre in PvE, but pretty handy in PvP. If you're using it like a replacement AR Thord Eye probably still isn't that handy, but if you're hardscoping it's nice to be aware of your surroundings. The bature of the gun means you're ptobably doing the former, but it's all down to playstyle.

Army of One can be nice anywhere, but is definitely more effective in PvE where there are more enemies with lower health, so you're more likely to are more likely to be getting unassisted kills (and enough of them to make a real difference).

Generally I would say Third Eye for PvP and Army of One for PvE, but given the nature of the gun, ymmv depending on your playstyle. If you're a lone wolf, run-n-gun kinda guy in Crucible Ao1 might be great there too.

Tl:Dr - Third Eye is only really for PvP (IMO) Army of One can be applicable anywhere depending on your playstyle, but is more noticeable in PvE.