Melee scout is a major no no in PVE unless you are doing a fight like Nihil or something and even then its still meh.
I have tested every possible Melee scout PVE build and its damage just does not hold a candle to ranged scout. BUT, I cant agree that ranged scout will beat melee in every AoE pull. Cause to be honest Tesla arrow is a easy one to take in a melee build, and then razo rush with whatever racial aoe. I would honestly say it would be the same damage.
Tbh it depends how much " melee " you have in your build, but taking razor rush r3 since the removal of dodge parameter ( and even before ) was something that I always did in my pure ranged pve dps spec. Along with tesla and incend, razor was a nice boost to my dps. Sure you can take tesla arrow ( and incend if you want to ) in a melee spec, but then again it will be far more dificult for a melee build to fit in tesla/incend than it would be for a ranged one to fit in razor rush.
For tesla/incend to be effective in a melee build a scout needs to get the secret knowledge ruby with are set inside the solid shot grid relatively far, while razor rush is just by art of death rubies.