lady-bower
Breeze-Noir-White-Blue is designed to work in Plasma. You will not have a good experience with it in Budgie.
If you want to try it, just download .tar.gz file and then extract it there in Downloads folder.
Copy the folder Breeze-Noir-White-Blue
to ~/.icons
. Then open Budgie Desktop Settings and select there in Icons section this theme.
About McMuse-Circles icons, I tried the purple version.
McMuse-circle-purple work better with Budgie. Installing it is almost same.
Download .tar.gz file extract it in Downloads folder. But this time you have to copy the two folders inside McMuse-circle-purple
folder, McMuse-circle-purple
, and McMuse-circle-purple-dark
to ~/.icons
.
To switch to this theme you have to use again Budgie Desktop Settings.