I would change this to Raw/Atmospheric Black Metal.
Source/Evidence:
Render of the Veils (2014), very atmospheric, intense use of keyboards, a LOT of reverb on the vocals, drums very far back in the mix. However the riffs are heavy and notable enough to warrant a Raw Black Metal tag: https://www.youtube.com/watch?v=iuhqXfrbvwE
I would change this to Raw/Atmospheric Black Metal.
Source/Evidence:
Render of the Veils (2014), very atmospheric, intense use of keyboards, a LOT of reverb on the vocals, drums very far back in the mix. However the riffs are heavy and notable enough to warrant a Raw Black Metal tag:
https://www.youtube.com/watch?v=iuhqXfrbvwE
Caduceus Chalice (2010), vocals are still very reverby and atmospheric, but there is less of a use of keyboards and when there are keyboards they mainly accent the riffs:
https://www.youtube.com/playlist?list=PLqbwrEfSYGypyWlpSfKpT_OIywUdNgA1d
I think simply 'Black Metal' can be expanded upon using these tags.