my current party of 10 halberdiers and 2 x missile troops carve them a new one (well armoured experienced team)
shields are not the be all and end all
their front line troops are pretty static they will hardly ever move out of formation, use this to your advantage
rush the archers and stand there and pick off their front line (the pike armed gobbos would be my first target)
i am finding this team is far more effective than my last shield carryign guys as i can carve up a gobbo in a single swipe from most of my guys, they are incredibly fragile when you start swinging big weapons at them, while all my guys are beserkers it means i can clear the line in almost one charge
their archers are a massive pain whatever you have