During this extra rare spawns period, I've been trying to do hunter of skyfire. So far, I'm just missing The Crimson Sentinel. According to the resources I've found, the ph is an angry Arcron. I've found 6 of them altogether, and I've now killed a total of 150 of these over 3 days without seeing a single named. Did they change the placeholder, or is really supposed to be this stupidly rare? The other nameds were rare too, but this is just taking the p***..
To answer my own question: After 183 angry Arcron's, The Crimson Sentinel finally spawned from the static Arcron, standing by the pillar near Gorowyn entrance. I could hardly believe my eyes. Update: Also, The Crimson Sentinel spawned again! from the static Arcron near the lava river (loc 3300, -300)
Meanwhile, I have been killing certain mobs in pop with friends in shifts for 24hours that still haven't spawned.
I spent about 8 hours across 2 days trying to get a named in EW to spawn. Finally he spawned. And again. And again. And again. The RNG can be cruel.