Gain a spike suit and shinespark vertically into the spikes, being careful not to turn around or move forward until Samus falls far enough, to avoid additional spike hits. Position the spark as far left as possible, to be able to land on the ledge and avoid acid damage in case of failure. After gaining the spike suit successfully, for extra safety the shinespark can be delayed to wait for the acid tide to go low.

Requires:

{
  "obstaclesCleared": [
    "B"
  ]
}
{
  "or": [
    {
      "and": [
        {
          "doorUnlockedAtNode": 1
        },
        {
          "canShineCharge": {
            "usedTiles": 19,
            "steepUpTiles": 1,
            "steepDownTiles": 1,
            "openEnd": 0
          }
        }
      ]
    },
    {
      "canShineCharge": {
        "usedTiles": 18,
        "steepUpTiles": 1,
        "steepDownTiles": 1,
        "openEnd": 0
      }
    }
  ]
}
"h_runOverRespawningEnemies"
{
  "spikeHits": 1
}
"canSpikeSuit"
{
  "shinespark": {
    "frames": 1,
    "excessFrames": 1
  }
}

Dev note: Leniency is not included, because there is a farm available.