Isn't it possible to just Google "How to fix crashes during difficult battles"?
That's the thing, there are no crashes in the middle of the game – the save file just gets corrupted after a certain number of turns. Is this also due to the new weekly mobs? And is there any way to slightly fix this process without removing them? They are sometimes needed purely for farming experience or other rewards (yes, I'm a casual player who plays Necropolis at night).