I don't see why won't you use it on the Swords Dance set; that would be just brutal. 180 permanant Base Power due to Air Lock coming from 876 Attack will just murder anything not named Palkia, Reshiram, or Heatran. The former two also have a chance to be 2HKOed but that's irrelevant. I'd always prefer Fire Blast over Overheat 100% of the time, as that sharp drop in SpA is not worth the single 140 BP, but the permanent 120 BP. And I disagree with you saying that once you use V-create your sweep is over. Firstly, V-create does not lower your Attack so the Swords Dance set is still extremely powerful. +1 Rayquaza is not a pleasure to deal with as well. Moreover, most of the counters to Rayquaza are Choice Scarfers, such as Palkia, that can take a boosted ExtremeSpeed and OHKO back, or opposing priority users, such as Arceus and Thundurus. I could see V-create working in MixedQuaza, but it would have a tough combat against Fire Blast, as both are extremely useful.
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