Funnily enough, as Saka myself I ate the three Baktrian cities on turn four (and Chach too!), and continued to roll Pahlava by 260 or so, then Kophen and Taksashila (Level 2 mines, Indians, and all the Indo-Greek troops, though a grueling fight against a fullstack that ate the whole 45 minutes of time). By 255 I had former Parthia, Baktria, parts of Seleukeia, and the steppe right to the north (Maszakata, Alanna, Yuezhi, Saka, Dayuan).

AAR that covered that expansion: https://forums.totalwar.org/vb/showt...ht=Of+Mail+Men