Oh right, I forgot that Thanatos has C-frame defense down. Yea, that's highly desirable.

Nephthys's 3rd skill currently has an unknown multiplier. Probably the same as Tyr's, as all the skills of that type seem to have similar/same ranges.

Dark Amaterasu's Black Propaganda-like skill will overwrite, not stack with, Black Propaganda according to the wiki. So no dreams of extending overdrive meters by 2.