"Weak demons"??

Ereb, you understand that we're talking about the late game, where every skill point counts, and losses from mobs, like 13 Imps, aren't taken into account. Although protection is a good thing for demons, it's not rational to take a build focused on that because of mobs. Then we lose Stone Skin, Fire Vengeance, and many other things. Machines are also not safe to take in the late game. So, the only thing we can rely on is Temptresses + Darkness.