There are no fights at all here. Just pure movement and you will always end up in Rank.
General Notes
Don't forget to tap forward + Air Hike during the first fall
Offence Heart DT restore shines here because of the flight utility through the lava room, Flame Heart room and the door near the pipe.
If you are not comfortable with the Orb route then do Stuby Stinger, which should always guarantee you an at the same time turn off lock on gun jumping so you don't shoot any enemies by accident for an E rank.