Mind blast usage is poor, 11.5 seconds between, ideal would be around 9.
He gained 27 orbs and used 9 Devouring Plagues in the span of the fight.
He's not double tapping SW but instead waiting 9 seconds between, The changes in 5.4 make this a dps loss vs double tapping.
Dot uptime is really bad. Went almost 30 seconds without dots at about the 70% mark into the fight. He's letting dots fall off before re-applying most of the time.
MF:I usage is fairly poor as well, this will improve with mind blast usage however. As he only had 19.6% up-time on DP. You'd wanna aim for closer to 25 with this talent set.
Talent choice is also wrong for most fights. Power Infusion is vastly underpowered in comparison to both ToF and DI in 5.4
It doesn't appear he ever changes talents between fights. Insanity:PI:Halo on all the logs here. There's a post somewhere around here of ideal talent choices for each fight.