Which is a better moveset for my salamance?

The second one makes more sense to me. It's more strategical and much better. Your first set of moves is all speed and strong attacks with less accuracy. But your second set has speed(from dragon dance), strong attacks and much better accuracy. And if it's okay, you can try changing life orb to a persim berry because you already have dragon dance and so cunfusion will be healed after your outrage.