agreed. But I think you meen Bloodbath and Dragon Roar. and I would do BB+leap first, then DR. and my point still stands, that if DR would do threat, it would also resolve our aoe threat "lacking" (in comparison to the other tanks) at the beginning of a fight.
so at the end of the day, it ultimately leads to the question: why the hell does DB not do any threat? it would be an insane synergy, BB+DR both have 1 min CD, so you always could use them simultaneously. which would be a huge deal in terms of both snap (DR) and continuous (BB) aoe threat....
but since DR does not do any threat, this just doesnt work. and Shockwave is too weak to be a good burst threat ability (when competing to other tanks, of course.)