Acid allows for more time than water to perform Spring Ball jumps. This gives just barely enough time to fit in three spring ball jumps.

Requires:

{
  "notable": "Reverse Acid Dive"
}
{
  "obstaclesNotCleared": [
    "A"
  ]
}
"h_heatProof"
"canSuitlessLavaDive"
"h_doubleSpringBallJumpWithHiJump"
"canTrickyJump"
{
  "acidFrames": 375
}
{
  "or": [
    "canInsaneJump",
    {
      "acidFrames": 450
    }
  ]
}

Unlocks doors:

{"types":["super"],"requires":[]}
{"types":["missiles","powerbomb"],"requires":["never"]}

Dev note: A crouch jump is not required. The leniency frames are worst-case scenario of not having enough time for the last jump, which is the most common way to fail.