hmmmm, im soloing act one Inferno as we speak with a Barb. not much more difficult than hell tbh. I don't even have any items equipped that i bought from the auction house. Only had to pass up one elite mob too, it was in that khazra compound and he had 8 minions instead of four, arcane, frozen and molten. pretty rediculous combo.
52K health
1267 STR
1279 Vit
6K armor
Low armor.. whats ur res?