I’ve been able to come up with this so far:
It selects all violin tracks, soloes them, selects their parts, moves the locators to include the parts, selects the consolidation track, runs merge MIDI in loop, selects the consolidated tracks part, deletes doubles (since I work with layered VSTs), then deactivates the soloes. This is reasonably clean, but I have to hit “ok” every time it runs the merge MIDI in loops. Can I avoid this somehow? If I could just avoid the dialog, then I could have a macro run a macro for each instrument and presto manifesto at a click of a button I’d have 90% of the tedious prep work for setting up the score done.