Can these be used with a crossbow equipped, or just melee? I know it says "melee" attack - but if memory serves, the animation is just swinging the RuneArm, so I'm not sure if it's melee exclusive.

Bonus Question: If it can be used with a crossbow, is it too much to ask if it works with Duel Shooter? I mean, I can see where that would be silly... but I had a curiosity.