The Evirs must be killed quickly before they descend too far. It can help to fire at the Evirs from a safe distance so they will not be triggered to attack Samus.

Requires:

{
  "resetRoom": {
    "nodes": [
      2
    ]
  }
}
"Gravity"
"canDodgeWhileShooting"
"canPlayInSand"
{
  "or": [
    {
      "and": [
        "Plasma",
        "Wave"
      ]
    },
    "canTrickyJump"
  ]
}
{
  "or": [
    {
      "and": [
        "Plasma",
        {
          "cycleFrames": 900
        }
      ]
    },
    {
      "and": [
        {
          "haveBlueSuit": {}
        },
        {
          "cycleFrames": 900
        }
      ]
    },
    {
      "and": [
        "Wave",
        {
          "disableEquipment": "Ice"
        },
        {
          "cycleFrames": 1320
        }
      ]
    },
    {
      "and": [
        "ScrewAttack",
        "canFarmWhileShooting",
        {
          "cycleFrames": 980
        }
      ]
    },
    {
      "and": [
        "Spazer",
        {
          "disableEquipment": "Ice"
        },
        "canFarmWhileShooting",
        {
          "cycleFrames": 1360
        }
      ]
    }
  ]
}
{
  "or": [
    "canWallJump",
    "HiJump",
    {
      "and": [
        "canGravityJump",
        "h_doubleEquipmentScreenCycleFrames"
      ]
    }
  ]
}
{
  "or": [
    {
      "noBlueSuit": {}
    },
    {
      "notable": "Blue Suit Sand Walk"
    }
  ]
}

Resets obstacles: A

Farm cycle drops: 3 Evir

Dev note: Technically it could make sense to clear obstacle A, but with Gravity it is irrelevant. FIXME: HiJump + Spring fling can be an alternative to Gravity.