Good find seems like that is a pretty good idea for mastery+haste built warlocks. Just doing it roughly in my head make a whole lot of sense. More damage on dots plus maximizing chaos wave damage. I am thinking that for the mastery>crit or even crit>mastery build to use Chaos Wave on any proc for the chance that it will crit. I have had one Chaos Wave crit for 113k which is doubling my soulfires with buff in meta.( I have a log of me trying new rotation on a Garrosh wipe, I am still rusty with the rotation as you all can see in the log.)
http://www.warcraftlogs.com/reports/...-done&source=8 I hope to master the rotation by tomorrow's raid in Mythic, that is when I can give a more accurate log.
Regarding that log and looking at my spells and their crit % I find all of them over 50%, this is including my Felgaurd's main abilities and melee, Wild imps, and holy hell 72% crit on doomgaurd. I have a feeling fights such as protectors are going to be in the high 30-40k+ dps range.