With the addition of both Choice Specs and Draco Meteor, a Special Salamence turned from mediocre in 3rd gen compared with the power of DDmence to straight out destructive. Draco Meteor is the main offensive move, tearing apart every non-Steel in the game not named Blissey. To deal with those pesky Steels, Flamethrower is used here. Fire Blast is an option over Flamethrower, but note that anything that Flamethrower would have OHKO/2HKO'd stays the same even with Fire Blast. All you will get is the a stronger, but less accurate, attack out on neutral targets. In the late game, Dragon Pulse is used over Draco Meteor, being a strong, consistent source of damage for Mence. Hydro Pump is to deal mainly with the only Steel that resists both your Draco Meteor/Dragon Pulse and Fire Blast: Heatran. Likewise, it easily OHKOs bulky Ground types without decreasing your SpAtk and catches Physical walls nicely: 252/0 Skarmory is still 2HKO'd by Hydro Pump. 