Every Akisho and Jarso I met say they are Somali. Perhaps we need to split up by subclans of these two clans to ascertain which ones are Somali (Dir) or Oromo.
Argobbah are Semites who moved from the southern Arabian peninsula.
Guji: Where do they live, how far west are they from Somalis in eastern Hararghe? One Guji, Oromo's? paternal haplogroup was T.
I did a quick check of Oromo paternal haplogroups, breakdown:
70% - E-V32
followed by A and B
5% - T-M70
It is conceivable every Oromo with a T paternal line could be a 'lost' Dir.
The aftermath of the Adal Wars bred chaos all over the region. There is no doubt about that. There is also no doubt about Oromos from the south taking advantage of the situation by moving northward and eastward and assimilating a lot of smaller clans.