ah, well firstly thanks very much for your support.
but I know how to use a second group in battle, I just want to keep them pure(like 100% LV5 noble mounting archers), because sometimes replenishing their numbers means you have to go through the whole map, and mix them with cheap soldiers is reducing their firepower
and yes I know how to use different soldiers well(riders mixed with infantry), just get tired from giving orders to 5-6 squads at the same time.
yet, in e1.8, I think I have found a new way to make my life easy, now I myself only lead horse-bowman, and my team 2 are combined by all kinds of charge riders. considering armors are so useful and effective now, their death probability( with AI control) is far more acceptable, I don't need to sacrifice any cheap riders to keep crack troops alive anymore(gladly)
team 2 being summoned by another vassals army is not much frequent to me, when it is, these stupid lords will know who is the King/Queen(dismissing them without thinking) lol