Do The Impossible, indeed. Looping a thin thread over someone's head several meters away is tricky business. The slightest bit of wind throws it off. And this must be done without moving the wand or betraying the operation through one's facial expression. I can't imagine it being done without the utmost concentration, allowing of course for effort to be expended talking to Voldemort and maintaining mental blocks against any Legilimens among the Death Eaters (recall that in Half-Blood Prince Snape was able to detect spells forming in Harry's mind). This is all done perfectly the first time around. Thirty-six times, plus Voldemort's wrists.

I suppose one can honestly say A Wizard Did It...

This is bloody brilliant foreshadowing!

Do bullets go faster than spells, or is it that it's faster to pull a trigger than to cast a spell?

I made my suggestion.

Assuming you can take down the death eaters, I think the correct follow-up for despawning LV is... massed somnium.

We've seen somnium be effective at range in the past, taking down an actively dodging broomstick rider at range. We've seen the resonance hit LV harder than Harry, requiring tens of minutes to recover versus seconds.

LV is not wearing medieval armor to block the somnium. LV is way up high, too far away to have good accuracy with a hand gun.If LV dodges behind something, Harry has time to expecto patronum a message out.

... I think the main risk is LV apparating away, apparating back directly behind harry, and pulling the trigger.

If knowledge of the True Patronus can prevent people from being able to cast Patronus 1.0, is there a way for knowledge of the True Patronus to harm Voldemort?

I agree. A carbon nanotube metres long and whipped around fast. And Hermione screaming, "Harry!!!"

My grandparent is working on the assumption that Dumbledore is the culprit and would have had simple ways to make sure Hermionie doesnt die by mistake as a result of the attack he coordinated.

More than that, it's trivial to nullify that possibility. Just watch the battle. If you know it's happening, and you know where it is, then just use one of the many, many scrying implements we know Dumbledore has to watch the battle. The moment the troll ate her legs Dumbledore should've been there; even if he wanted Harry to save her or something he could've discreetly stabilized her, Harry had no way to notice.

I agree that it would be a useful exercise, but given constraints of time as well as opportunity cost, Harry may simply be prioritizing other pursuits.

What do other people subjectively experience when they are thinking? To me its like talking to myself (in verbal english sentences) but I'm told that isn't universal.