Walkthroughs for custom maps.

You can also find the right random outcome on HD+ by iterating through rounds, but this is only suitable for fairly specific battles. As an example.

I have used this myself many times. In the Bug Race, in a battle against 600 black dragons, the duck, with random outcomes from HD+, guaranteed to poison the dragons. And then it was possible to complete the battle map using the method of substitution. Otherwise, you could spend hours on that battle. As with the final battle in Break in One Day :D