This would be put in which religious/existential category? Perennialism? Panentheism? Universalism?

Playing make-believe combined with delusions of grandeur.

>my imaginary friends control the whole universe, but you can't see them because they're just too cool

CTMU

https://ctmucommunity.org/wiki/God

Perennialism. Possibly syncretism.

Your need for categories and labels only obscures the truth. Abandon definition, stop masturbating.

Sounds like a variant of panentheism

All religion is a form of schizophrenia

AI answer. The image below describes perennialism (or eternal philosophy). Why is it perennialism? Main idea: Perennialism claims that all major religions of the world share one and the same fundamental, universal truth (in the image: "all major religions express aspects of a single, ultimate divine reality"). Superficial differences: This philosophy teaches that different dogmas, rituals or sacred writings are only superficial differences or symbols leading to the same goal ("apparent contradictions between them are surface-level... symbols pointing to the same infinite truth"). How is it different from the other concepts you mentioned? Universalism: Although ideologically close, religious universalism focuses more on the idea that all people will eventually be saved or reconciled with God, regardless of their religion. Perennialism emphasizes the deep philosophical and mystical unity of religions. Panentheism: This is a metaphysical concept about the very nature of God (that God encompasses the entire universe, but also transcends it). Although the text mentions that this reality is immanent and transcendent, the definition itself begins with the compatibility of religions, which is the essence of perennialism.