If blight hounds 1 v 1 isn't a challenge then something is severely wrong with disproportionate player power because even at my best I still barely scrape through a fight using my dragon, and i'm yet to see someone who doesn't have to really pay attention and employ their best tactics in order to survive the fight (read: everyone who i've ever seen fighting them has had to be at the top of their game to solo, even for the super-elite) O.o
No one fights them because easier things to kill drop better loot. Because people tend to kill the easiest thing that gives the best outcome.
But right here is also a great example of where the super-elite can chose to fight harder things if they want to & which doesn't effect the average player