The Royal Crossbow is garbage, It takes like 10 hits before it hits more than a 50, and after that the max i've seen it hit is like a 150. Saw this in BornForPvm's video of him using it
It has good stats, but the special effects ruins it. If its going to be good at all in say a nex kill, its going to be 3 phases in before it starts hitting good.
Did you see him do the Nex duo with it? It was matching the CCB once it got powered up, but between each phase when switching to the minions and then back to Nex it has to recharge. Still, useless :/