I personally disagree. I think he certainly CAN wreck your soul! With the choice scarf moxie set, you can switch into a pokemon that needs revenge killing and get to work! For the following calculations, Salamence has revenge killed one mon and has a moxie boost. (What if the revenge-ee switches out? You can either fake a choice and not run choice or switch.)
Salamence 2HKOs Rotom-W with dragon claw and is not OHKOd by HP Ice.
Talonflame can only 2HKO with Brave Bird and is OHKOd by Stone Edge
Outspeeds and OHKOs Genesect with Fire Fang
Outspeeds and OHKOs Gengar with Dragon Claw
Outspeeds and OHKOs Garchomp with dragon claw
2HKOs Aegislash S with Earthquake and is almost never KOd by an Iron Head + Shadow Sneak combo (Blade)
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The problem with scarf mence is the fact that it can't spam Outrage any more. Its coverage moves are never meant for sweeping, except in rare situations. Any move now that Salamence locks itself into can be easily exploited, unlike before. EQ for obvious reasons, Fire Fang and Stone Edge are weak and unreliable, respectively, and Outrage can let you be revenge killed by any Fairy, and Aegislash which is everywhere right now. Dragon Claw simply doesn't cut it in terms of power. As for those calcs; Rotom-w will use w-o-w and ruin your scarfer/sweeper, CB Talonbird KOs after Stealth Rock, Genesect is never going to come into a scarf Salamence locked into fire fang (unless it's CB where Espeed does ~50%)
Basically, there are so many flaws with Scarf Mence; there are so many better scarf users right now