Just popping in to say that Draco Meteor should definately be the main option over Ice Beam.
Super effective Ice Beam does 190 base power, while normally effective Draco Meteor hits at 210. Thats over 10% harder of a hit. Draco Meteor also hits those 4x Ice weak dragons much harder, especially Garchomp, who almost always packs a Yache Berry.
The one pokemon that would get harmed more by Ice Beam than Draco Meteor is Gliscor, and Draco Meteor smacks him around anyways. I see Ice Beam is a fairly redundant option. Draco Meteor also allows you to lay down a powerful dragon attack without getting trapped by Outrage. It's coming off of a decent 254 special attack so it'll dent stuff. In fact, Outrage is only 27% stronger than Draco Meteor, so i think it's definately worth it.