Well to be honest all we do is offer advice, its your warband and of course it will be modeled to suit your playing style,
my list was different to yours in the fact i went for the same amount of men but i had 2 more swordsmen and some men did not have 2nd weapons. kind of a trade off but I'm curious how you found the extra 2 marksmen, and did you split them into 3 groups of 2? or two groups of 3?
For mine i had 2 groups of 2 marksmen covering the two melee groups.
1 consisting of Captain, youngblood, champion and a swordsman. Other had the 2nd champion, youngblood and 2 swordsmen.
In a campaign I'd buy 2 more marksmen with normal bows / blunderbuss's prob and use them to move in behind the melee groups and shotgun some enemy to the floor which the melee heroes could take out.
For your team I'd try to get one of the marksmen promoted and if your lucky you could get to the point where he could have a crossbow or long rifle and works as your deadly lone sniper who stays far enough away to worry about combat.
Mordheims a great game I'd love to play it more, especially as you can interlink the games with your WHFB's if you play it in villages or out in the wilderness like 40k kill teams.
As in the mordheim battles are small squads from your army working to fulfill an objective to make the WHFB easier on your main army aka commando style