I notice that a war company can consist of multiple peoples, each with potentially a different outfit (specific armor and weapons, maybe steeds), harm, and armor. Each people's war is also different; you settle it by taking a modal average of the War of each soul in the company. I recommend the same for harm and for armor, each reckoned separately, not in combination.
As for special options resulting from outfit, be they for archers, for cavalry, or for a shield wall (infantry with round or larger shields), I would recommend allowing a war company to use a set of special options if, and only if, more than half of the souls in that war company qualify for that set. The same for special circumstances, such as fighting mounted: more than half of the war company must qualify.
Charles