The moment you are ready for the mixing stage, you should disable all effects on the Virus output and project out bus, then solo each Virus MIDI track at a time, and do a realtime bounce of the soloed track to an audio track. Once you are done you can bring back the effects and start mixing.
How would I disable all effects on the virus output and project put bus?
How would I solo each track even if its on multitimberal?