Duels - are wounds are shared out among only the Musketeers present in Paris, or among all?
Constance has disappeared - is there any limitation on the number of Musketeer taking part in the mission, or on the number of actions used per Musketeer?
Why? (so the answer is no)
Weapon Running - this has two challenges shown, are two actions needed to overcome them?
Each challenge in the game needs one action to overcome, so yes 2 actions.