Actually, worked on a new plan:
Greenfeather men are either mercenaries or their own men with a merchant focus, either way I will guess that they do not have a very high morale and would likely break if the situation seems unwinnable, so the focus should be against them initially to shift toward Nightfell. That, of course, would imply splitting them up and I think I know how to do that.
Now,
@Shorticus since this is our home turf, can I give the layout?
So lets say while the enemies are still away I move archers along with horses in tall grass and set them up
like so. Maybe we can even fight with the sun at our back? Meanwhile me along with the men I went to raid the Nightfell with move forward (along with some people able to lift tower shields) on foot and taunt the advancing Nightfells, with me swinging crossbow bolts since I'm really hard to kill rather than hide behind shields. Considering I have the fancy armor that screams 'I'm the leader' and that I led the raid against them, I think our chances are good to attract them.
We fall back at the speed they advance and once they are close enough, the archers begin to fire their arrows. If the Nightfell column continues to advance, they get up and get everyone on their horses to scream murder and charge right at them to try and frighten them. If they don't bulge, we turn to the side and flee like little bitches.
In the meantime, most of our forces can charge down the Greenfeather warriors with superior numbers as well as most of the gallocmen, etc to try and route them while the rest is distracted.
Thoughts?