The Romans and the Anatolean Plateau

Could romans have transported tribes from the danube region, cumans petchin eggs, to fight for them in anatolia? It would have taken a much wider christian world, or indeed, a mongol invasion, something dramatic, to break the power of the turks. Listener l w asks what the various comnenian domestics did while the emperors were on campaign. He elaborates, did taticios and axuc accompany alexius and john on campaign all the time? Were they guarding the frontier when the emperors left? What role did the domestic have while these, you know, successful general emperors were leading the army most of the time?