It's alright, though I could see it being confused with other fantastical, non-mythological asura if not made even more specific. It may be worth considering asura_(religion), asura_(religious_mythos), asura_(indian_mythology), asura_(god), etc.
Additionally, while article you linked is indeed for both Indian religions, there is also a separate article linked within it for just Buddhism.
I also can't find any reliable sources regarding Asuras' appearance as it pertains to Hinduism. The three-headed, nine-faced, extra-armed god description seems to pertain almost entirely to Buddhism.
At minimum, the extra arms and "very powerful" thing might be consistent across both religions, but the three heads thing is chiefly Buddhism and Hindus-that-took-inspiration-from-Buddhism-or-got-their-mythos-confused. To me, the Hindu one is more of a powerful oni with extra arms but not more heads. So the Buddhist concept seems to be much more deserving of its own tag, whereas I'm not sure I'd even create a tag for the Hindu concept.