I don't really have a particular grasp for Adedre, buuuuut... for some reason, I kind of lean towards this music... especially if you visualize certain twisting notes near the beginning coinciding with making herself an abomination of flesh and bone, an aberration fighting for her own survival. Whether that's appropriate or not, I'm not so sure 
For Morganna, on the other hand...
I keep leaning towards this theme for various mini boss battles with her mannequins and dolls.
And then... this theme... for one very particular battle
Might feel for different music as I think about it more, but that's just what I think of offhand