iop for all of these is solusekseye again. I'll leave it up to you on how to break these up for mapping, the levels down there weave over and under each other.
I logged them into seperate files that mark natural transition points, elevators and zone crosses.
I used less points on these as suggested let me know if I can do anything else to make it easier for you. I also put in an emote with each line break describing what I was logging in case you have to move chunks of points around to different maps because of altitude.