If he gets 4 Royal Musks out at once they 1 pistol shot villes. That's where I've found the best use for early early Roy-Musks right in their base at 5 min with a 14 Age Up. The next best bonus is that because they're 160 H.P. they won't get 2 shot by the T.C. once you send the 15/15 Nat Card or the 20% H.P. Wilderness Card.