One thing to worry about first is the camera and were in the game you are clicking. You can use /script SetView(#) where # is 1-5. I bound the setview keybind of [ for view 2 and ] for view 3. Just set them up before hand and then just push [ and then your spell and then your mouse click broadcast. I use it on my hunters for flare. I kinda like it if my flares are spread out, so I put my hunters views off by a little. I don't use it on my locks, I like hellfire since I have a priest to heal anyway. I admit I don't use my DKs DnD enough, mobs just die too fast and it is a LOT of runes.