I will not disagree with you on AngelScript's documentation being rather lacking. While implementing the runtime support is doable for an experienced developer like myself, I would not want to inflict it on a junior dev. Ditto for learning to use AngelScript from just the official documentation.

I'm currently working on a dedicated website for NymphCast (to be launched over the coming weeks/months), that will contain development guides for NymphCast apps and kin, as well as some AngelScript tutorials and references.

Since it's a hobby project at this point, any timescale I can give is relative of course :)

(I'm the NymphCast author)