Why ? Is this because you've run out of DSP power to EQ your synth tracks ? I have a Luna as well so that gives me 9 DSP's but even with only 6 the Pulsar Mixer lets me have echo, reverb, EQ and chorus on all tracks whether they are coming from external lightpipe, CUBASE VST or REASON.I do the same... put all my recorded Pulsar Synths (not VST) onto seperate audio tracks so I can tweak them a bit more, add EQ blah blah...
I'm sure there's a better way, but I'm just sad and old and stuck in my ways
Then I feed it to my external multiband compressor for mastering via SPDIF before going back to ASIO / VST. I never have to record any MIDI tracks or make more than 1 pass on my final stereo output.
) before sending everything to protools or external studio gear (great verbs compressor etc, including pulsar 3 effects like master verb, graph eq, psyQ etc which are great). It's an obligation when i have whish to finalize. However, i also do a "home-finalized" mix with "reduced" tracks (mixes of groups of tracks) but that's for a different purpose (to give an idea of the track and not have to deal with cpu/hard disk speed stuff, because my computer is not a protools