In Dawnbreaker, the miniboss Deathscreamer Itenak uses an ability, "Dark Orb", that applies a private aura debuff to its target. This is functionally the same as the ability used by the second boss, but has a different spell ID (spell ID 450855), so setting a sound for the boss's version doesn't affect it.

It would be extremely helpful if the miniboss's Dark Orb could be added to the "Private Aura Sounds" section for Dawnbreaker so that players could set a private aura sound for it.

This is happening in Littlewigs version 11.0.57 (with Bigwigs version 370).

This will require some changes in BigWigs. Right now only boss modules that "engage" can register private aura sounds, and trash modules don't engage. Once that is addressed adding the spell to LittleWigs would be straightforward.