The Subeshi archers are different in an important sense; We made them awesome for one reason only, and that was their superior equipment (The Subeshi bow for instance was one of the most advanced bows of its time, and the arrows used by them may according to some analysis on arrows in Pazyryk have exceeded some 80cm, or two feet and nine-ten inches), allowing them to out-range horse-archers, as foot-archers with their ground platform, as opposed to the horse-back, always had the advantage of stationary precision, as well as the greater capacity of storing the energy, the Subeshi bow dwarfens the Western-Scythian model. If the Subeshi archers rock, then it is intended for it

However what they have in punch, they lack in versatility. I'd almost compare it to the Iberian solifera and the its tactical usage by Iberian warriors to the pila used by the Romans. The soliferum is absolutely devastating, but the pilum is not the baby's javelin toy either. The Medean-Achaemenian archer formations, with shield-walls, spears and continuous hails, with newly introduced Western-Scythian bows and a greater influx of the Parthian-style gorytoi... If we sacrifice slightly on the nasty punch of the proto-Hunnic bows of the Subeshi and Qum-Darya, but add safety-measures such as light but large and tough pavises, some padded armour and a big stick to discourage light horse, along with a tried and tested archer tactic, and I think it sums up versatility in a nutshell.

Unfortunately on the RTW engine, options are limited, but with M2TW and the "stakes" feature, which I hope can be tweaked for our pursposes, I think we've got better prospects ahead of us.