Saho and Afar derive from the same dialect stream before diverging into separate classified languages.
The Hadiya and Kambata speakers live close to each other, intermarry, and have similar traits such as sociocultural elements facilitated by proximity, with both languages sourcing from a common language, relatively recent in the statistical sense. I think these two languages (in practical everyday use) should be a lot more intelligible than their theoretical standing because of speech influence and convergence of group behavior and very close genetic distance.
Given the geographic considerations, is there such an affinity between the Saho and the Afar as well?