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Could your solution be as simple as one of these?

1. Set up an aux send for the drum mix to feed Aviom (sounds like you have done this)
2. Set up a group (not DCA) for drum mix to feed mains.
3. Mute the group when needed (to remove drums from the mains)and this should leave the aux feed live for the Aviom.
This would allow you to make a different mix for Aviom.

Another possibility,

Send drum mix to 2 different sub groups and use one to feed the mains and the other (Leave unassigned) to feed your Aviom.

Hope this helps or is even going in the right direction.

Indiana, USA