There are 6 Luminant spawn points, 2 happen to be close to the base of parradamo tor hill...
If you find them the only way you're getting up there in time is if you attempt to flee up the hill 300x in a row til you get it down perfect... i mean perfect, without bumping a wall, slowing down, etc. i suggest wearing thf af boots, and bringing a herme's quencher with you. you can get up there in 60 seconds if you do it flawlesly, and face it, if you try it enough you're gonna eventually get a perfect run and not hit any miasma... this is in no way impossible just very hard and you gotta be very bored to do it. movement speed +12% isn't gonna do crap for you, so don't bother unless you can find 2 bards who don't mind being bored wasting their time for you to get an item.
You have to do this as a thf if you go alone, you need flee duration+ and a herme's quencher.. powder boots recast 10m and you can't make a macro to use them, but i've done it with just flee, (no duration+) and herme's and made it up with 1 miasma wall, and hit the sides a couple times (i did good) and it still took me about 2.5 mins and flee wore off like 45 seconds before i got up to the cradle of rebirth.. With flee duration+ i used flee, hit 2 miasma walls, bloched up a ton on the sides, by the time i got like 5 steps from the cradle of rebirth the herme's quencher just wore off and i got the item.