For all my brass, I use Sample Modeling Instruments, which are dead dry out of the box.
You have to create your own articulations, using modulation, unlike the normal situation with sampler brass libs. If you want crescendo, you need to draw that automation. If you want staccato, you have to draw that automation. This pain the ass gives you added dynamic control you don't get with Brass staccato number 587.wav in another library.
Methodology is as follows:
The Dry individual insts. are posed spatially using Virtual Sound Stage (basically a fancy panning utility). The Early Reflections in both virtual sound stage and in the sample modeling kontakt instruments are OFF.
Then, on the dry individual tracks, I have two aux sends (PRE FADER). Both go to an Altiverb Instance. The 1st altiverb would be Todd-AO impulse, at 13 meters, early reflections only. The 2nd Altiverb is Todd-AO Impulse, 13m, Tails only. This is so I can dial in predelay on the tails (normally you would predelay the early reflections, but Altiverb is backwards due to how it was sampled). At 13.5 meters, the early reflections in the Todd AO rooms should be delayed about 55ish miliseconds. So (remember, its backwards), I predelay the tails only Altiverb by 55 ms.
This is one reason why I split ERs and tails, but another is that you may need to do corrective EQ to either the Early reflections or the tails individually, depending on how the sample library reacts to the impulse.
So now, I combine the oriignal dry channels with the two Reverbs in another Bus, the Brass Sum bus. Typically the sounds are rather dark at this point, convolution reverbs are like that. I like to boost the highs with the Puigtech EQP1A, or a similar EQ.
I use this same method on each individual section (trombones, horns, etc) because they may need slightly tweaked settings vs eachother, but the basic concept remains the same.