I would think Outrage would be better in non-singles because after the kill they can't simply switch in a fairy and expect the Outrager to hit it though they have a good chance at best.
Draco Meteor/Outrage typically shouldn't be used in a non-Singles environment IMO. I'm sure there're important calcs that make 'em worth usin' in other formats, but the cost of switching can easily outweigh what ya gain outta it if not used tactically.
You indeed can't Rotate while doin' a rampage move.
MR's Azumarill no longer has permission to exist.