Salamence already seems some use in Ubers with its DD set, which has as advantage over Rayquaza the base 100 Speed and Intimidate, though that comes to an use in very rare occasions and Air Lock is just all around better. However, Rayquaza is clearly superior as a sweeper, so they are usually paired in an attempt to remove each other's counters (usually being Salamence the first one to come out and Rayquaza doing the cleanup).
I don't think there was a need to make a thread about this at all, especially because Salamence has an Uber analysis...