If you play a demo spec and have specced into decimation you can get extra dps on blood prince council. Just target one of the princes that are not empowered and cast SB or incinerate and use the 10 second duration on decimation to spam Soul Fire on the empowered target. Once decimation falls off just cast a SB on another target not empowered to get the buff again.
It will give you slightly more dps until you get to 35% or less when you can just spam Soul Fire normally. Hope this helps some people!