@TTL Party Chat Ep #009:
Yeah, the PS4-exclusive "Undying Mind" Strike is, actually, quite unpleasant, as I got to play it last week or so. First you have five waves of forces with all sorts, including Hydras and Axis Hydras, but it gets A LOT worse once you reach that long, narrow staircase beyond the Atrium...
When you get up top, you encounter about three waves of Precursors - for those who haven't played Vault of Glass, they are basically smaller versions of the three Sol Progeny Minds in the final Campaign mission. Each wave will have about half a dozen Precursor Minotaurs, which can take up to 30mins total to deal with in close quarters even if your allies are Lvl 28s, including a Cyclops. As with Minotaurs as well, when they're not firing off artillery, they will gladly teleport in your face or chase you down back to the staircase to melee you to death.
After that when fighting Undying Mind, they are pretty much the mainstay alongside standard units. He also has four small riot-shields instead of a single barrier, which makes it tough to inflict damage whilst waves spawn on top of you from all directions. Essentially the strike took an hour to complete.