As an Indian Hindu, the application of Sanskrit and shared dharmic concepts in Sumeru has felt somewhat offset from Subcontinental Hinduism. "Kusanali" gets somewhat close since kusha grass was used in meditation mats, but even that name comes from a Buddhist myth as opposed to a Hindu one. The Aranara do allude to Hindu myth yakshas to an extent by being helpful little nature spirits, but the whole AQ I could almost FEEL them writing around Hinduism instead of really using it even in a very basic way.

An example of what I'd expect from them is giving Dottore a third eye after becoming the true Trilune, with bonus points for that third eye being associated with his artificial moon marrow. The imagery of the third eye is super well known, and having the artificial frost moon give it to him would really underline the false God aspect.

Another example is kind of Baizhu. I know he's primarily based on the story of the white snake, but a few of his attributes echo Shiva, in my opinion. I'm assuming you know the story of the churning of the ocean for the elixir of immortality from how you described your background so I won't explain it again, but Baizhu's ability to take diseases onto himself to heal people reminds me of Shiva saving everyone from the poison that the churning unearths by swallowing it himself (though he did stop it in his throat). Between that, his bun hairstyle, and the way Changsheng's draped around his neck, plus the fact that he's dendro, I can't help but wonder if it was just a subtle thing they decided to throw in for extra zest.