Not sure if worth mentioning, but when it comes to picking up immediate hate on enemies either dreadnaught from Turn 8 or adds from Turn 7, I try to initiate with preloaded Savage Blade over preloaded RoH, or if ranged pull seems to be the only option, Provoke + Shield Lob into Circle of Scorn or SoW whichever is up at the time + flash and then start the usual threat combo.

The reason being is that although RoH has higher threat modifiers, there's an animation delay vs that of Savage Blade which is almost instantaneous. During that period of RoH going off can mean your mob turning around to smack someone in the face or running off to the healer only to come right back to you, which can mean loss of dps time, especially for your melee.

The same applies to ranged pulls. Provoke seems more instant than say Shield Lob. I'm not sure why it works that way, but it has worked well for me in gaining hate and keeping things in place while dps can just go ham from the getgo.