Azure, rusty, and other super dragons: do they live up to the hype?

Personally, in my opinion, azure, rusty, crystal, and magic dragons are trash; they're only worth buying when you have a ton of money for taking cons, hives, and Dragon Utopia to draw damage. They deal poor same-hit damage, but they are very tanky—even in Dragon Utopia it's hard to kill them if the hero has decent stats and defense