Design: Halberds [6+1]
While going through the archives of our earlier work, one of our researcher priests dusts off a decade-old prototype for an anti-armor halberd he found buried in a supply closet somewhere. The original design was a bit of a mess, but when he showed the rest of the design team we managed to make the necessary tweaks.
It's essentially a spear with a few extra bits slapped on. A small axe head sits on the side opposite a short curved hook, and the leaf blade is replaced by a long, thick spike made of hardened steel. The spike lets a powerful thrust punch through all but the thickest plate armor, and the hook is perfect for catching hold of an enemy and dragging him to the ground. The axe head is useful for powerful swings, and excels against unarmored opponents. The length of the halberd also gives the user an advantage against mounted opponents, and the hook can be used to drag the enemy off his horse.
The halberd is more useful when used in tandem with allies, as one can hold an enemy steady while his partner lines up a thrust. It also does better in formation tactics, but in dense areas where movement is limited it can be difficult to use it to great effect.
The additional steel required makes the halberd more expensive than a traditional spear, but not so much that we can't outfit our entire army with them. Cheap.