That edit you made would certainly over ride mine if it was loaded after. Maybe you can combine the two to include my edits in your script, then just don't use mine. I edit 3 different areas of that script, let me know if you need help, or send the script you edited to me in PM and I'll edit it for you.
The idea did come from Guild Wars actually. The Ritualist skill flesh of my flesh kind of does the same thing. I wanted to drain magicka also, but using that effect tended to not work correctly for some reason.
I think FLOMF costs 5 energy, and yes it does, cost... 25% health if I remember right. I think if you worked the scripting right.. and I know its possible I just don't know the scripting to do it or attempt it. I mean it sacs so much health, you should be able to add magicka spending in there as well.
Now that I'm thinking about it, has anyone here worked out blood magic? Like the Necromancer... actually what about curses as a whole? I think that when I finish my C++ class this semester(game programming style) i'll see if i can work out some scripts for it. Spells like Spiteful spirit ect ect.
I mean Spiteful spirit should be very easy, we have reflect damage already, just need to add an aoe effect onto it.