Ive played Epeiros and Getai so far, and decided to try out Saka since thye were descroped as nigh impossible. However, I couldnt understand the government system at all, with the getai and Epirotes, they were numbered as 1,2,3,4, however this is not the case with the Saka. Plz explain.

I have eliminated Phalav and Baktria but do not own Alexandria Aria and am without reforms(need help on what the refor does as well)