Infraction: 10. Do not respond to terrible posts.
Message to User:
Please don't reply to bad posts (or those replying to bad posts). It just furthers the cleanup. Just report it instead.
The macro should be used while your frost/unholy runes are on cd due to obliterates. For example you could use it after blowing your death runes on an oblit. There should be a point in your rotation where you have 3 oblits in a row using up all your runes at which point you would use the macro combined with a /cancelaura.(assuming GoD) Other opportunities in your rotation are discussed at length in this thread.
I personally find it better to execute it between Blood Runes so you avoid staggering your blood runes and maintain better uptime on it.