Well, that's how I played... I just got lucky with the "random" element... The problem is with the 15 or more replays... Considering the multiplying hordes, it takes a lot of nerves to try out each option while they move around.
Okay, let's see what gifts you have prepared for the Devil – I quickly defeated his heroes – while I was wandering around the Realm of Death, my army had time to grow...
The most annoying thing is that in 4 castles, there isn't a single Chaos creature higher than level 3... It seems there weren't any in the Devil's castles either. Damn random!