Mystic Brands are now available for Captains and warband soldiers.
The brands can added to all Standard soldiers. As per the rules, units with the keywords Undead, Demon, Construct and Animal are excluded. Remember that a brand takes up an inventory slot, this isn't really catered for in the rules so its your responsibility to keep within the rule set on this one.
Mark of the Fang and Mark of the shield provide persistent Fight and Armour bonuses, these are factored into your split stats as per levels, items etc. Any conditional bonus is not factored in.
Please test and let me know via the usual channels if you find any errors.