In Outland, he succeeded. Not so here.
Probably a reference to the Misfits song "Green Hell".
This is a very tricky mission to do 100% purely based on abilities. You will basically need a mistweaver monk(fen tao), holy/prot paladin(vindicator onaala alliance only), resto shaman(Greatmother Geyah horde only), frost death-knight(only through inn) and lastly an affliction warlock(only through inn) with Powerful Spell/Magic Debuff - this being a very tricky combination to fill. You will most likely need to do a few ability rerolls to get these specific abilities. If it's worth it at the end? I honestly don't know. It's a lot of resources involved and the mission itself appears like once a month. It's fairly easy to get it to around 80-90%(if you have blook or other similar traits). I'm assuming if you're reading this you're looking to do this with two treasure traits. It's hard, but not impossible!
Miall(tb/mas) and Vindicator Onaala(ps/md) if you're alliance gives me 100% chance, both with treasure and no other traits to boost the chance of success.
The Timed Battle/Massive Strike is easy enough to do using followers picked up through the world.
As of patch 7.1, this awards a Weapon Enhancement Token, not the gold.
Garrison Timer Mobile App
[Upon completion your 随从 will gain: ]
Missions and Followers math for maximising success chance
Treasure Hunters: Making Gold with Your Garrison [Archive]
Warlords of Draenor Garrison Missions Guide