ANKH DUPE SETUP!!! Thanks to 'dialect' for concept

New knowledge note: This setup is NOT frame perfect, you have like 2 frames to throw the arrow...
Additionally the position is NOT precise, you have about a quarter of a block to position yourself.
ADDITIONALLY, this entire this is HIGHLY improvisable... XD
Pause buffering is not needed, nor is it even that important, given that it's not too precise. Yes, you need the pack to blow up on frame b and to collect the ankh on frame b+1, however since your initial falling speed is very slow, and your terminal velocity is decently large (about .4 blocks/second), There is SOOO much leeway!!!
I might make a secondary video explaining in more detail what I mean.
Just know that it is not that precise.. XD

Onto the original description:

What you need:
bombs:
6 with powerpack on multiplayer, 7 with pp on couch coop (This is what is shown, 7 with hoverpack on multiplayer, 8[?] with hoverpack on couch coop.
ropes: 2 required with pp, 3* required with hp, 4 desired with pp, 5* desired with hp
with hp, if you have climbing gloves then you can just climb the wall to get out.

Steps:

firstly, MURDER THE HIRED HAND (in couch coop... ofc)

place the 2 bombs to create the 2 block island that the pack gets placed on. You can use 2 ropes here but not required. just did so to make the setup 100% consistent.

place the 3rd bomb [not power packed.]to the left to prevent undesired entities from being created when the pack gets deleted.

for multiplayer: make sure the coffin is as far right as you can get it, and place a bomb [not power packed!!!] 1 block back from being against the wall, important that it is ON THE LEFT of the coffin. This makes the coffin fly away. Idk if that's needed or not.

bomb the ankh drop spot. you only need 1 bomb here regardless, however with pp it looks better plus no rope needed... :) with hp, drop the bomb on the left side AFTER you make the 2 block island.

place the other 2 bombs, first one power packed on the rightmost tile there, or without pp one block down and left.

Hop up with the use of some ropes.

whip the ankh into the spot. make sure that it is centered in the block [might be important???]

Make sure there are no gold or gem or whatever along the top left of the map at all.

Now or earlier, you need to dupe the pack with everyone who wants ankh who isn't actually grabbing it.

place 1 rope on the right block of the 2 block island.

climb said rope..
look left.
hold down
place pack WITHOUT moving horizontally.
drop to the right of the island,
and whip the pack left.

throw a rope to the ceiling on the leftmost block that isn't a part of the coffin.
climb to the top of the rope with the arrow,
look left.

You should be set up now,

You need to do all 3 of these [ON THE SAME FRAME]****** actually just semi close timing....
left + down + throw.
if done right, the pack explodes on exactly the frame before that you grab it, causing the pack to be deleted at the same time the ankh gets picked up, leading the game to give every player the back item of "ankh" who had the powerpack previously.

Might take some practice with the semi tight timing, it's a bit hard without certain skills.