Are you familiar with using Enochian magick to fight negs? A well know magician advises to use Enochian magick to fend of curses and negs.

The best book on Enochian magick is "Enochian Vision Magick" by Duquette.

And here is a good online source:
http://www.evocationmagic.com/viewforum.php?f=17