I read somewhere that it's far easier now for casters to solo old raid content than it was during WoD. Is that true? If so, how comparable is a caster's ability to solo something that would be considered challenging right now (such as Hellfire Citadel, or MoP mythics)?
I've been playing a Vengeance DH so far in Legion, and the soloing is pretty easy, but painfully slow and boring in most cases. I'm just curious if any casters can clear legacy content with anywhere close to the effectiveness of Blood DKs, Vengeace DHs, etc. If so, which ones, and why?