Routing in glitchless speedrunning is a lot more important than routing with glitches (In my opinion). It causes you to prep for a frame perfect turn, even if its just for a millisecond of time save. Hello i'm VoidCloaker, I do Jumpscare glithless runs and here are some tips for doing glitchless runs. First the most obvious. Learn the maps or else you make the same mistakes i did which include getting lost, getting lost causes so much time loss. If you check out my runs you'll see i got lost a lot so don't make that mistake. Second is to do practice runs, weather its in game or mapping out your routes or etc. Practice will make almost perfect even though it sounds cringe. Third and final is... Just keep uploading runs constantly, you will slowly improve your routes and maybe even find skips or major time save. In the end it's your choice whether or not you use them, you can decide how to do your runs, because in the end its about having fun with the speedrun.

P.S. One more thing that will improve your speedrunning skills is reviewing your own footage by yourself or with other runners, so yeah do that too.