Ego Diss. - VoT has Ego Diss in it. The others don’t.
Best recommended to keep in stack if you don’t have VoT
Blockage Removal - Not needed with Vibes.
Schumann Res - I only play this on as needed basis, but it would have other benefits outside of Vibes series.
Raise Vibes - Not needed with Vibes series.
Higher Self - Probably not needed unless you are making a specific request and still feel “separate” from your HS.
Self-Realization series - So the Vibes work more on a energetic/physical level of “enlightenment”, while Self-Real series works on a more mental level of “enlightenment”.
Meaning if you listen to Vibes (or Ascension) long enough you would get the Self-realization series “benefits” anyways, in time.
So I see this series as being a perfect complement/supplement to the Vibes series and it’s still part of my stack.