This shows a new and very easy naviless setup, though it would break a deku stick. It is possible to avoid the slash by tapping down 4 times. It concludes with a trick by Pheenoh to do the megaflip to Zora's Domain quickly.
This is a very fast naviless setup, though difficult to execute. To do the initial roll, hold down and very slightly left. Before the backflip, hold down for two frames (or tap down twice before backflipping).
Here I show the newest setup for the 'BK Skip' angle, and manage to get to the boss room in 36sec (with some pause buffering luck).
The setup is simple: Backflip+roll (with re z-target); Instant drop bomb+roll+backflip and wait until hit; Sidehop right with re z-target.