What would be ways for SBURB places to escape into the first ring without telekinesis or throwing meteors? Could they take a battleship like Jade did and sail out that way? More importantly, could it go fast enough to outrun the scratch?

Honestly, Roxy kind of just. Sleepwalks into the Furthest Ring, it seems the border of the Incipisphere isn’t too far away from Derse itself. If it’s anything like Prospit having Skaian Eclipses, it’s likely Derse’s Moon actually passes through the Furthest Ring whenever the moon turns just right. So all you would kind of have to do is drift into Space and hover for a little bit.

That being said, this would also put you in the middle of an uncharted, tentacle-filled nightmare afterlife- And that’s even if the Horrorterrors allowed you to even interact with the Bubbles (Remember they were made by Feferi’s Request).