everything depends on how big the song gets via promotion and marketing, publishing can be said to be the composers (producer/songwriter's) retirement plan cause its comes when the song is exploited

It all depends on the clout of the artist. There are no right or wrong answers. The idea is to maximize profit from both Master recordings and Publishing.

I think it depends. Artists with better stream # will make more money on masters royalty, but contemporary artists like Asa dem will make more of their pay from publishing, licensing etc.