Inferno is, in my opinion, the worst castle. The units there are weak and uninteresting. At most, you can get something out of efreets, magogs, and devils. You can say the same about the castle itself, but Archangels, Crusaders, and Fanatics compensate for the level 5 Grand Master unit)) and generally make the castle worthwhile. I mainly play with the Stronghold – I love having a horde of wild barbarians in my army. Sorcery, of course, makes you wait for something better, but Kreg the Hack with an attack skill of 30 will take care of everything, even without magic. I don't like the Tower – it's really expensive, as they say. But the magic there is great... Necropolis – that's the one! Morale doesn't matter, combat spirit doesn't matter, it steals spell points, regenerates, lowers enemy morale, you can get skeletons for cheap, especially in the Demon Realms. And my favorite thing is the Raise Dead spell on one of the heroes, I forgot the name... In general, I can play with any castle, but I don't like Inferno.