First off on mythic hellfire assault theres a couple of places to improve
1) Your premonition (4 set) uptime is only 37%. I think max possible is 75% so you need to use shadow fiend more often. The fiend itself will do more damage and the MS buff is very strong that you lose out on.
2) Your SW:P uptime seems low unless you have downtime between spawns. As a general rule I'd SW:P the berserkers, felcasters, engineers and vehicles. Try not to let it drop off.
3) You could have cast a few more mindblasts. (14 or so) You also need to be better at sniping SW
's. Ours got 13 more than you on a similar length fight.
4) Finally, mindbender > Insanity here imo. You spend too many GCD's channeling where you could just be dotting and pumping DP's into prio targets.
Can't really comment too much on the other fights. I suspect on council / kilrogg its if you get fixated / go to the other realm. All I'd advise is try to make sure you have a full bank of orbs and Dot's rolling when the ring comes up. Sure we can't line Cd's up with it but every little helps.
Edit: On assault you wasted 26 orbs.
Council you wasted 23. It's place to improve too I guess.