General gameplay tactics and its features.

There is also this tactic (when playing as Necropolis). Quickly build up to Vampires and upgrade them. Then, calmly build up to the Capitol. If there are a large number of low-level neutral creatures on the map, there will be many skeletons, and they will help you earn money and resources. In this case:
1 - the hero levels up.
2 - you calmly build the Capitol first, and then the troops.