Oh, lol. That's so weird.
If it only works specifically on bullets and crossbows then it should be fine. Those are two very specific types of projectiles.
Guess I'll continue this. I"ll make a small argument, since I don't have time for much else.
There's no real buildings or anything for Daud to place the mines and things onto. There's in an area that's rather sparsely populated by trees, with the giant hands being the closest thing to a building. She also has no need to fly to any place she's been to attack him, she can just let her birds do the attacking, as she normally does.
I also feel like it's out of character for him to teleport several hundred meters in the air. If there's instances of him doing so, please do correct me.
Sleep darts will be harder to hit due to the large population of birds that will be flying about. It's far more likely that they'll hit a bird as opposed to Nephthys herself. In particular since her mobility through flight is general superior to Daud's mobility in general, barring his teleportation.
As for stealth and dust, I very much doubt she would let herself be caught in any kind of strange dust or mist considering there's a
a character in verse that has rather lethal mists. She also has the aerial mobility to avoid such. And, once again, there's a far higher probability that something will befall one of her dozens to hundreds of vultures before anything happens to her. Stealth is less relevant due to where they're fighting. And Daud will be incredibly hard pressed to hide from the sight of dozens to hundreds of vultures being mass produced when there's very little place to hide. Additionally, it's easier to see from the high ground regardless.
I'm also unsure how fast Daud would attempt to decapacitate. I see no reason why he would try to put a vulture coming at him to sleep rather than just trying to kill the swarm coming at him first, thinking he could and then having to try to deal with five times that swarm.
That's all for now.