The reason it says not to spec bloodworms is that they hit & heal for a pitiful amount when raid tanking and they dont improve your threat. I think the worms have their uses in heroic dungeons though, especially for a group that has no dedicated healer (rets group). Ive made my own frost click macro, but it sucks and stalls every other rotation(have to wait for blood runes to recycle). I manage a pitiful 1.2k dps with it. I'm crossing my fingers that it will be enough when I resurrect my ret group come 3.3 that they wont pull mobs off tank.