A good blood magic witch build

Hi everyone !

According to my readings, most of players here seem to think that Blood Magic (the passive skill) for witches is not a real viable/effective option.

So here is a video made by Cromar from TGN explaining a pretty nice blood magic build for witches, with lot of possibilities.

http://www.youtube.com/watch?v=9NQFPNDXi6c&list=ELHRyHhtRGMt0&index=9

Take the time to watch the video entirely, it is really well explained and clear.

I would like to have your (constructive)opinion on this.

Enjoy !