Virtual Percussion and writing Multi Parts

I'm writing a concert percussion ensemble piece for a recital I'm hosting in a few months, with the instrumentation:
- Marimba, Vibe
- Marimba, Xylo
- Percussion 1 (Anvil, Snare, Sizzle, Hand Cymbals)
- Percussion 2 (Concert Toms, Mark Tree, Suspended Cymbal, Bass Drum)
- Percussion 3 (Suspended Cymbal, Bass Drum, Congas, Bongos, Temple Blocks, Crotales)
- Timpani

It's been mostly smooth sailing, but having to go through on the multi parts (especially perc 3) with instrument and .drm file changes every time I want to write something harder than middle school beats is getting very frustrating. Is there a workaround (e.g. default .drm settings, a workaround for constant instrument changes)?

On top of that, the percussion 3 part stopped playing back on the conga and bongo patches in the 3rd movement. Does anybody know how to make them start playing back again?