A time turner goes back in time a certain amount of time for every rotation. Not that hard to figure out how many turns are needed.
Pick up said turner, count 'em off.....1...2..3...4...5.....Or hover it and speed turn it.
Go back in time, kill the force users before they are born, or as they are children.
Not really. Harry Potter time travel is utilised in 'stable time loops', which means that any travel always happens and is always factored in to the timeline. So basically they'd either have always have won the fight with help from their future selves, in which case they'd never have a reason to go back unless they talk with their future time selves (which is expressly forbidden and dangerous) or they'd just lose the fight.
Plus they have no time-turners as per the OP.
30 minutes prep. Each side has knowledge of each other. Hmmmmmm...........
Battle starts. Hermione Granger is thousands of feet away, tucked safely in a building, tucked under Harry's invisibility cloak. She is being protected by the OOTP members. Flitwick is there, and he has a "Protego horriblis" shield charm protecting them all. Hermione whispers "Confundus."
The Jedi lose focus, suddenly wonder what they're doing there. High above the Jedi, Dumbledore swoops down and casts Immobulus on them.
At that point, it's like shooting fish in a barrel. Voldemort administers Fiendfyre, Death Eaters mop up with Avada Kedavra.
Originally posted by Sadako of Girth
They feel her prescence, she is sliced in half with a lightsabre.Palpatine and the other Sith level Hogwarts with Force crushing the roof and foundations, ripping it down on the wizards, crushing them into a raspberry jam like texture.
"Now THATS magic"
The Jedi aren't getting past a Protego horriblis, or whatever that spell is called that repelled half apparating death eaters. No way in hell.
She utters confundus right way, while thousands of feet away from the Jedi. How they gonna cover thousands of feet, then get past the shield, all in 1/4 of a second?
They can't.
They die.
Yeah? How they gonna get to her? Before the battle, she'll most likely be at the castle. The Jedi are muggles, they'll never find the castle, much less get past the shield charm. And during the 30 minutes prep, there's no fighting going on, just prep. When the battle starts, the shield goes up, she's protected, and the Jedi forget what color their lightsabers are.
They'll know where shes gonna be, so they could place charges under the ground of where thats gonna be.
But the castle will be a smoldering ruin....
LOL The Jedi are most definitely not just Muggles.
They dont need a silly book or stick either.
But as they have all been crushed, the only thing they'll need is lots of buckets for their remains to be scooped into.