I remember reading that Mythic Blackhand was hotfixed so that a Priest (or an MC-capable class) was not needed anymore. Is this confirmed?
Prydaz, which my Shaman is lucky to have, is immensely helpful with older content. Not a must-have, but more a "in case of emergency" item. I use the twisting nether ring as well. Get it to ilvl 1000 and you'll be fine...mostly.
When we're all Level 120 and in decent BfA gear, like everyone, I'm coming back to smash Legion content. I do it for the funzies.