The guide makes it seems as if there is a resource neutral rotation that you can switch into when necessary. You'll take a dps hit, of course, but will be able to continue ranged dps without completely depleting your force. Obviously we don't know how a raiding situation will work out. How long will fights last, how long will end game sorcs be able to do their full dps rotation before going oof (out of force?), etc, so I don't know how this will really work out. I'm certain melee won't ever be the answer, though.