This means you need to take and deploy 1 unit, for example, vampires. The other army just gets in the way. All the dark energy should be spent on them. At the end of the battle, it will be easy to resurrect and continue without losses.
Well, I don't know) because the computer always attacks with vampires) Well, I guess I haven't mastered all the tricks of the game yet, which means there's room for improvement=))
There's also a ring that reduces luck by -2, which can also help.