How? That area was basically an empty land for Assyrian colonization.
There were some pastoralists there, but they had abandoned the use of the chariot, and those unassimilated by Ashur were enslaved by northern horse nomads.
I am just going to say now you can't take any random tribe from scratch and make it into an empire. And when you do you have to explain why them and not any of the thousand other tribal ethnicities.
If you really want a 'persian' empire perhaps you can look into the Elamites, they are fairly closely associated with the Persians during the expansion of the Elamite Empire and given that they managed to dominate a pretty large area they could be a good bet for further expansion: