For quick bursts I go into meta, activate immo aura, carrion swarm on CD, and keep attacking the boss/main target, this is enough for e.g. Ball Lightnings on Lei Shen.
E.g. the adds before DA is worth putting doom + corruption on if you're doing the AoE tactics, just do immo aura, carrion swarm(also interrupts) and spam Void Ray to keep Corruption rolling on all targets, dont forget double Felguard spin as well as imps to keep you in meta for a really long time.
I use doom on e.g. the adds during DA just to get more fury/imps as they live rather long while the tanks drag them to the soak target. Other than that I can't really think of any adds that are spread out and can't be AoE/Void Ray'd.
Sounds about right, not sure you have time to actually get ToC off as I haven't tried it myself but that sounds optimal.