I tried this exploit 5 hours after it was announced. I was amazed that it worked and I could finish hell difficulty with my mage with a breeze!
As I'm pretty tired of the game, playing through inferno with my mage with god mode will probably be the only way I'd ever finish inferno.
It's just impossible with my Barb. Previously it was indeed 100% impossible for Barbarians to finish inferno without using Auction House. Now they've made drops "levels" better and so it's actually possible to finish each act with the barb. But with an IMMENSE amount of farming
They tell u specific play styles wasn't needed, but it's DEFINATLY needed. Try playing the game as a barb without using LIFE ON HIT in a2, a3 or a4 infernal difficult
Good luck