as far as speed is concerned, this is a terrible idea. however it still may actually be doable. you wouldn't need to worry about the heat damage since you could just transition back to magma pool access. the only problem would be if ceiling warping doesn't work over the pb wall.
You can't get the Chozo PB expansion without PBs, you can't blow open the wall from the other side so it's not possible to get back out.