How can I make a MASH node loop a translation/animation

[epoliqui]

I'm trying to make objects look like they're falling, and then have that be a perfect loop. Right now I have a MASH instancer setup to distribute voxels through a giant box, and then I translate that box down in front of the camera.

It creates a pretty seamless loop but a lot of the objects appear in front of behind of other objects that they very obviously shouldn't. Does anyone have an idea that I'm not thinking of to achieve this?

I also have to render over 700 frames for this to work, and in the end I get about a 5 second loop, so if there's any suggestions on how to lower the amount of frames this take I'm all ears!

Here's what I'm trying to do if that helps https://giphy.com/gifs/jq5HEYPf1a8uqIGFY5/html5 

[epoliqui]

I think it would help A LOT if I could duplicate my MASH instancer network. I was thinking I could export the alembic and reimport it into the file, and just add a frame delay (which is essentially what I'm doing in After Effects) but I cant export MASH instances to Alembic, are there any other solutions for that?