o_O
If you don't have Fire Blast, you lose to Bronzong and Skarmory every time. It's not about statistics, it's about beating the most Pokemon you can possibly beat to make it harder for your opponent to wall you.
The only Ice-types that even dare come in on Salamence are Mamoswine and Weavile on revenge to Ice Shard Salamence (in which case it is switching out regardless of what set it's running). Stone Edge is actually for beating Gyarados without locking yourself into Outrage (since Outrage crushes Ice-types but with 100% accuracy).
It's not like you're trying to DD up on Rampardos (not like anybody uses it lol). You send in Salamence on soemthing it totally scares away (think CBHera stuck on Megahorn or ObiBliss) and you DD while it switches out. That's why you have prediction.
=o