Jashin isn't featless, Hidan cursed Shikamaru in the name of Jashin and now Shikamaru no longer has a dad.
Other than that hypothesis, we don't know about Jashin. Kishimoto could easily turn him into a fake deity too or not.
It's up to him, he just never expanded upon Jashin other than its a violent cult.
@321zigzag1: Azuma was equal to Erza in terms of physical strength but overwhelms her altogether with his fierce magic. That's just the way it has been and her win was also complimented by plot which seemingly had a great tendency on helping fairy tail characters win against strong opponents even when the circumstance should have dictated otherwise.
Well there is this notion that tenrou island helped boost FT in magic but I don't know how much. There is a disagreement there.
Azuma was also in home field advantage but there were relatively equal until he did that final spell. But she also got back from it. It's the 2nd one when Azuma realized the island was protecting her so that was a plot moment.
Well its been dictated as the infamous nakama punch in this case nakama slash. TNJ level although I say TNJ is more dangerous.