I think sword spawns in the Park once you've gotten the good ending once
Idk if I have the sanity to shoot for the under 6 haha, it seems like it's random where you get placed after the quit out near the trowel, sometimes you're right up against the door and sometimes you spawn in near the bridge. I think if I can figure out how to force a closer to bridge spawn, I might be able to work with it
Dog seems really fun lmao
<SPOILERS BELOW>I think most of the endings would be good besides the ones that just require waiting to complete (Mist, Darkness, maybe strange hallway). Iffy on End of the world too because it would just be the same run as Good ending but without getting the stone. The one's you've done for sure sound good though, maybe we start with those few then add some of the other later?
I would love some other categories! I've been thinking of routes for some of them and was just talking to a friend about how I'd like to try and run some of the other endings.