Rooney's campaign has yet to catch fire. He created both goals for RVP in Romania but has yet to open his own account for the season.
Ferguson hopes that will change, as he wants two forwards breaking the 20-goal barrier this term.
He declared: "In my experience, where we are at the moment you need two strikers who will get you more than 20 goals a season. If you get that, you definitely have a really good chance."