For this cycle, set it up with a updash into the room, fall down naturally, and jump updash and instant bubble activation.
Do this bubble wallbounce (similar to 4a room 2 start) around this height.
You don't need to climbjump off the corner if you space out the dash + jump input exiting the bubble,
but you do need to climb if you press dash+jump at almost the same time.
The rest of the room should be doable with just going full speed.