Advice needed for acquiring Elven Curve Blade

[Kazumetsa Raijin]

1. What Deity is recommended for the Elven Curve Blade?

2. Is there a way to get Weapon Focus through a Race or Trait?

3. Is there a way to get Proficiency with Elven Curve Blade through a Trait?

I'd like to stick with a Vanaras race, but I have noticed Tengu is a great option since it would give me direct access to proficiency with the Elven Curve Blade. I'd still very much like to stick to Vanaras if possible though.

This would be for a Qinggong-Flowing-Sacred Mountain-Monk/1 + Cleric/1 w/Crusader's Flurry.

[Imbicatus]

1: There is no Golarion deity published by Paizo that has the ECB as a favored weapon. You therefore can't use crusader's flurry with the ECB.

2: Elves treat it as a martial weapon. Kenku get it with swordtrained. Half-Elves can get it with ancestral weapon. Humans can use the bonus feat for it or be adopted by elves to gain the elven weapon familiarity.

3: Not since the Heirloom Weapon nerf.

[Master of Shadows]

Arcanists can get it with Blade Adept

[Imbicatus]

If you want to flurry with it, your best choice is Sohei 6/Weapon Master Fighter 3/Sohei x. Sohei 6 weapon training grants the ability to flurry with anything you have weapon training in, but Sohei doesn't give you the ability to take weapon training in heavy blades, thus the weapon master dip.