If the thorn user is just the absolute worst (takes more than three shots to kill someone due to missing/not getting easy two shot crit kills) then yes these weapons are viable but if the user has used thorn for longer than three seconds they easily outclass most of these by shooting twice and ducking. Red death's two burst kill is inconsistent since you need to land all headshots. Healing helps against dot but if the user two shot hides they win. I just don't like mida because it feels like the bullets do nothing, even on all crits and if you aren't running radiant dance machines you aren't really using mida. Vex will sometimes charge like a fusion rifle because Bungie still can't fix problems that their patches cause. So it's automatically striked from the list. Vision is alright I don't particularly enjoy it in crucible as scout rifles typically don't have a place in all these short range encounters although I can see its use in long range trials maps. The jewel really isn't great unless you are using icarus to its full extent. It's stats are pretty much fatebringer, which isn't a great pvp handcannon archetype for legendaries. The scholar is the king of scout rifles and the messenger is a better (more consistent) two shot kill than red death from watching my friend play with it. Those are your best bets if you aren't a playstation user. Hawkmoon is the best exotic primary by far once you get a hang of the fire rate and recoil pattern. It's effective range is near infinite with hardly any damage drop-off. If you're lucky you can quickly two shot a Thorn before they fire their second shot, and each shot may as well have high cal rounds as it makes the victim flail their arms like they just don't care. If you're a real pro you can see a hallway full of enemies and let aim assist take the wheel as it just delivers free 2-3 shot kills while you spray 13 rounds of pure rng death. The only downside is that sometimes hawkmoon is so amazing that you'll fire shots directly into someone's chest and it does so much damage all at once that the game doesn't even register despite knowing you hit them.