Assassination is doing great on the fight.
Pooling energy, keeping rupture up on the boss and dispatch procs for the sparks produces the best burst we have on those adds without using cds.
The boss takes the most damage sub ~35-40%, which means that assassination's execute really shines on the final burn.
Subtlety is really doing bad on the fight due to not having sanguinary vein up on every spark for burst and the frequent target switches.
Remember that in order to avoid losing uptime for melees, you canb ring the add out to reset stacks while melees still have something to do. That allows you to shadowstep back directly to the boss and lose little to no uptime.
For reference, this is a world of logs of our kill.
http://www.worldoflogs.com/reports/0...=10915&e=11465