Don't have a ton of time today, but I figured I'd bring up that apparently, CR 21 actually is the start of "epic" enemies. The
Chichimec is CR 21 and explicitly an epic encounter. I feel like this should either lower our epic barrier from CR 22 to CR 21, or make CR 21 "At least 6-C, likely 6-B". Whatever you guys think is best.
Edit: The
Mu Spore is also considered epic. Meanwhile, something like the
behemoth eagle (CR 18) or behemoth gorilla (CR 19) doesn't have epic damage, they just seem to have relatively simple epic feats (so basically fodder compared to the rest of the stuff in the book). I feel like this puts CR 21 as an appropriate place to start scaling to 6-B stuff.
Also, is there a lore reason the
Phane scales to the
Phaetho? The phane is
CR 25 while the phaethon is
CR 34, so in game terms they definitely aren't comparable. From rules, the phane seems like it should be "At least 6-B", unless there's a lore tidbit stating it's comparable to the phaethon.
This third thing is more minor, but should we make a note that
Kezef the Chaos Hound's divine power null seems a bit weaker than
Zargon's? Zargon fought off an entire pantheon (which is insane), while Kezef was cornered and imprisoned by a not fully described alliance of gods (contained at least Gond, Tyr, and Mystra). He still ripped off Tyr's hand, a great feat for just how strong he is against divine powers, but he doesn't seem quite as effective against them as someone like Zargon, as Mask was able to turn the tides against Kezef after acquiring a special blade from Mystra.