Eh, false. Smash alerts are really great for G farming, though can get boring fairly quickly. Grab alerts are good for XP farming. The only most useless alert I would say, is the Burst alert.
Gotcha. What about Aftershock then? I mean "Not All Walls Lock You Out" could also be related to memories. Maybe there is a creepy inside either Kovar's or Ellie's memories?
Just jumping in, trying available options. Has anyone ever thought on why does Nightmare Colossus able to spawn in 3 different locations? It could be a reference to Nightmare Invasion OMs. Maybe once you kill it, it acts as a trigger on death? Also, considering Death Rattle 2 will soon be a thing, maybe we can find some…