Unitframes and bars are ElvUI, but you can use these auras with any interface you like. Only "issue" is that rage bar is from elvui, so you need to make your own.
Soon(tm) i will build a version that has only few imports and includes rage bar, but it will be released after Nighthold progress is over.
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When you have Elvui, BenikUI, addonskins (links can be found in my post far above) installed, you run install as i posted couple post above and import Elvui profile, skada is right where it is supposed to be.