Just pull your jelly 1 split from your pb. That's what I'm a gonna do.
Some things to consider/thoughts I have:
-As far as I know, collectibles such as non-level-ending happiness objects and concept art packs cannot be collected more than once per file, except for in Santa. This means that file resetting will be a constant for non-any% ILs (although the all levels cheat is a thing)
-As for determining when to stop time on an IL, the moment you touch the last happiness object or hit the blue warp seems to be the best way to call time.
-Mermelair and Santa seem to be weird cases. With the mermelair glitch, we have to determine if showing the results screen in that manner is acceptable for ILs, as opposed to walking to the end of the stage normally. For Santa, the results screen shows up in a weird fashion due to the screen blackout. The obvious solution would be to end on grabbing the end-level object, but its rather hard to tell when you hit the bottom object. Additionally, there's "avoid the top 2 objects" strat that could differentiate the any% and AHO ILs. I think a good middle ground would be when you hit "A" on the last text box for the additional happiness objects, but this is something we should discuss further.
-As for powers, the only level I would be opposed to having early powers on is Jellyfishing Any% IL. Doing that IL with spin would make execution on tiki jump and barrel jumps different, which would be incongruent with the way the level is run in all other categories, and to me it doesn't give an accurate reflection of how the level is played. For all the other levels, its either irrelevant or to cumbersome to set up. Jellyfishing is easy to setup naturally from the get go.
I'm currently waiting on a new disk but ill forward this to some of the others. We have a discord chat for the community if you want to hang out and glitch hunt with people as well, plus you'll probably get a reply faster. (Link: https://discord.gg/JZc6a)