Yea 2nd boss was the main worry but I didn't bother to go try it. A +6 i'm fairly sure of I guess a +7 depending on the week (since 2nd affix kicks in) could be too much. Not trying this week since bolstering seems not worth it. I understand your point though, but I did play that HOV fairly conservatively all things considered, also have legendary shoulders now which would probably help a lot but yea I guess at the time of the post it was probably too optimistic to some degree.
Also went and did mythic socrethar and fel lord zakuun recently, 2p and lucky procs for interrupts makes socrethar a breeze, zakuun you just spellwarding the 1st cleave and bubble the 2nd. 8/13 M HFC.
Had a few close wipes on Nythendra but waiting for a non shit 895 trink to put in a reasonable # of pulls to RNG the berserk timer.