If it's a reverb in use just for one track by itself, i would suggest processing it together with the track it is used for (verb inserted on track as a substitutive effect). If it's a reverb that is being used as a master space which many tracks are being sent to (as an additive effect on it's own Aux) then i would suggest setting separate outputs just for this master reverb on it's own.
I use a second computer with a separate interface to run various convolution and other types of reverb without taxing the main processor on my tracking/mixing computer. Everything sends thorugh digital connections and can sum digitally or via analog out of the main interface (after receiving the verb returns digitally and then assigning them to their own outputs)
or go overboard: Get the Muse Receptor and load your reverb programs into it.