While I don't use VSL specifically, I've quite a number of other libraries and I'm able to get excellent results with the following (albeit lengthy) process:
I have created several templates including a sketchpad template which consists of all my regularly used instruments but has a very limited set of articulations (basically a long and a short) as well as section templates (woodwinds, brass, strings, pitched percussion, and non-pitched percussion). I compose using the sketchpad template. Once I've finished a piece and finessed it as much as possible I record each instrument onto a seperate .wav track. Then I'll load up my section patches and create more detailed versions of each part which I'll replace the sketchpad versions with as I go.
I find as long as I stay relatively true to the volumes of my sketchpad the blend works out really well. Whatever bumps there are I fix with some minor tweeks in the mix. I've only done this ENTIRE process through three times as its naturally a lengthy thing to do, but it definately works for me.
I have created several templates including a sketchpad template which consists of all my regularly used instruments but has a very limited set of articulations (basically a long and a short) as well as section templates (woodwinds, brass, strings, pitched percussion, and non-pitched percussion). I compose using the sketchpad template. Once I've finished a piece and finessed it as much as possible I record each instrument onto a seperate .wav track. Then I'll load up my section patches and create more detailed versions of each part which I'll replace the sketchpad versions with as I go.
I find as long as I stay relatively true to the volumes of my sketchpad the blend works out really well. Whatever bumps there are I fix with some minor tweeks in the mix. I've only done this ENTIRE process through three times as its naturally a lengthy thing to do, but it definately works for me.