@ Life Orb
Ability: Inner Focus
EVs: 112 Atk / 196 SpA / 200 Spe
Rash Nature (+ SpA / - SpD)
- Draco Meteor
- Flamethrower / Fire Blast
- Superpower
- Roost
EVs let you OHKO 0 HP / 252 Def Bold Blissey, Tyranitar, and 4 HP Heatran. You outrun Jolly Tyranitar as well as Celebi and Zapdos that try to outrun Jolly Tyranitar also.
Don't use the DD variant though, it is an inferior Salamence. You can use Bulky DD or Support though, but mixed is usually the best for Dragonite. ;3