I might be late to make fun of the schizo, but I still want to give my recommendations on Niji livers.
In general I think Lazulight, Obsydia and Ethyria are really good. I mainly watch Elira, Pomu, Selen, Enna, Millie, Reimu and very rarely Aia and Petra. I also watched Nina but she graduated and I'm still hoping she returns one day.
Edit: Speaking about NijiEN, a lot of the livers seem to be going on vacations at the same time. The Luxnoc offcollab was already talked about some pages before, but now Iluna + Enna is going on vacation too, and I think they are probably going to Japan. My bet is they are finally moving forward with recording the AR live, which they will probably show at the end of 2023 - start of 2024. Which is kinda frustrating to me because it's obvious they are working on something behind the scenes but we'll probably have to wait until everything is done until we have an idea of what's happening and who's participating, plus the fact that since the Lazulight 3D debut there has been a huge drought of that type of content.
Edit 2: Looking back for it I found a post from Bug Eater which kinda says the same thing I think, that they are probably blocking the 3Ds behind the paywalled big concert, just hope they finish soon and that we also get some 3D debuts not too long after that