Armorbane lets the model roll 2d6 for armor penetration. The Primary Weapon rule for SH vehicles says you may roll 2 dice and pick the highest for armor penetration. So what happens if you have a SH vehicle with a Primary Weapon that has Armorbane, such as the Macharius Vanquisher? Do you Roll 2d6 twice and pick the highest roll, just applying the Primary Weapon rule to the Armorbane roll? Or do you roll 3d6 and take the highest two, taking the Armorbane rule and applying the PW rule to one of the dice? Or is it a third way I haven't thought of?