About Dragonair I don't think it should be in the same rank as Shelgon, who really does the whole mono Dragon Dance more consistently. While Dragonair did get Marvel Scale, it doesn't have nearly the same amount of bulk that Shelgon has on its own when its not asleep which really makes a difference against Pokemon like Emboar and SD Samurott. Shelgon also has higher Attack which makes breaking through Pokemon much easier than Dragonair. If Dragonair really wants to compete with Shelgon in physical bulk it has to be asleep which is not really reliable enough, in my opinion. When its not asleep Pokemon like Emboar can easily break it with by just spamming CB Flare Blitz. If Dragonair wants to go a more offensive route it doesn't really have as much as what Fraxure has. While Dragonair has that magic base 70 Speed, its Attack stat, coverage, and lack of Taunt makes it less than ideal compared to Fraxure on a pure offense set. I would say that Dragonair should stay in D-rank.