Yes, I have a WeakAura that shows how long my BoS was up for and how much dmg it did. You can find it here:
http://pastebin.com/qYJ3AQWy
My opener is: Potion>HB>Pillar>RW>2x Obli>BoS>Horn of Winter then just try to space out Obli and use rime procs when I can as soon as I run out of runes just pop Hungering RW. However if you are trying to maximize your dps you also have to micro manade your RW, and try to keep almost 100% uptime with those 10 GS stacks. Sorry about the GCD addon, for some reason it thinks that every RW tick is me pressing it