Which skills are best for a hero?

The development of a Necromancer hero depends on who you are playing against and what resources are available – that is, the size of the map, the number and level of neutral creatures, the presence of mines, the presence of a computer opponent, and other factors. There is no single most effective development path – this has been tested hundreds of times, and there is no single most powerful Necromancer hero. Each has its own destiny.