The screenshot was taken in a warzone genius. And it is pretty easy to reliably hit for over 7k on a fully WH sorc if you know how to do it, and thats without the powerup you find on the map. The only hard part is getting the maul to crit once you've done it. Finding under-geared enemies in warzones isnt hard either.
In other words L2p
How is this even remotely a L2P issue? Good for you. You hit a crit on a retard. Are you going to brag about how you won a foot race at the special Olympics now?