Actualy i do have a doubt.
In late Numidia the Garamantes and the Gaetuli provided or possessed somo cavalry unit that could perhaps be added to the roster unit of Numidia.

Also besides Hiempsal II, Juba I do you know anymore family members or sons that served Hiempsal II or Juba I? Or perhaps some notorious general.

Also about Mauretania they will not appear as a faction however they will be eleutheroi. I know that Bocchus I is the king. However do you have the names of the heirs of Bocchus I or brothers?