An important thing here is to not buffer the first jump for the second ultra.
You'll notice the difference in speed with an unbuffered jump > ultra and vice versa.

Use the window as a cue to do the upright dashes.
For the 2nd half of the room, you need to almost buffer every input because of how strict the cycle is.
Make sure to get a bit of height on the hyper before doing the 2nd half.