There's no deathless category; an SS without resets run would have to take advantage of both. The only reason no one uses deaths in TP is because they aren't useful in TP. The only thing you can't do is reset the game and go back to the title screen. You'll want to check out
my old 6:23 test run from back in December/January since it was done before BiT was discovered and therefore doesn't use resets. You can probably also pick up a few strats from
my 5:39 run too, since it's a lot more recent and single-segment, though it uses resets. The main glitches/shortcuts I can think of that aren't in the 5:39 are (all of these are in the 6:23):
- Various small tricks and slingshot shots in Skyview (segments 6/7)
- Eldin shortcut (segment 10)
- Huge Lanayru Desert sequence break (segment 17)
- Teleporting Scrapper halfway up the mountain (segment 50)
- Deathwarp to skip saving the Mogma in Fire Sanctuary (segment 53)
Soo yeah. Use those tricks, my 5:39 should be a good reference since it contains more recent stuff and safer strats and my 6:23 should be a good reference for the parts the 5:39 skips. The 6:23 is segmented, but it was also a huge rush job, and slightly outdated (though admittedly not as much for a no resets run), so you should be able to get fairly close to it. Good luck.