I usually rule out Inferno because I can't play with it or against it. For a long time, it was considered a terrible faction, but only because few people knew how to play it. But after I got thoroughly beaten by players using it, I immediately put this faction in the category of overpowered ones, like Necropolis. It's basically a gamble. You spawn in the Dungeon, the starting location is bad – you can just give up. If you're lucky and spawn in a good location, especially if you're on top and everything is going well, then your opponent is in trouble.