Best map complete build
for leveling I always suggest to my guild mates Minion Master build with Staff + dagger or Axe for lvling up faster, an easy start to understand necro play style, also the ability to go full power, condi or even any mixed stats with any weapon and without putting much focus on survivability + the fun of face rolling your keyboard =P
after you reach lvl 80 and understand necro mechanism you can go deeply in Wells for powermancer or Corruption for conditionmancer then more advanced in terror, Death Shroud and other hybrid builds with rest of Signets & Specrtal utilites
also don’t forget to have a look on Namesis guide :
https://forum-en.gw2archive.eu/forum/professions/necromancer/Necromancer-tutorials