Hello,
The hierarchy in my knowledge has nothing to do with Samael Aun Weor or ancient Egypt specifically, althrough one of the master, Serapis Bey, was once an egyptian priest. In short they are a brotherhood of greatly advanced being that have surpassed the level of humanity and are now helping it in it's evolution from up there. Such masters include Master Morya, Master Kuthumi, master Hilarion, etc...
The best site to know about the great brotherhood of light:
http://www.sanctusgermanus.net/great...otherhood.html
The theosophy books also speak about these ascended master which are guiding us. Such a book is:
http://www.anandgholap.net/Masters_And_Path-CWL.htm
Have a good time reading.
- Raphael