Farm four of the pirates for drops. If you have full power bombs and can do so without using one you can also kill two Beetoms for guaranteed two small energy drops. Keep the bottom pirate alive: stun it with a Power Beam shot or i-frame past it. Once you have the reserves, perform a 1-screen shortcharge between the bottom doors, then hop back up to the bottom pirate's ledge and get shot at.

Entrance condition:

{
  "comeInWithRMode": {}
}

Requires:

"Morph"
"canUseIFrames"
{
  "or": [
    "h_CrystalFlash",
    {
      "and": [
        "h_RModeCanRefillReserves",
        {
          "or": [
            {
              "and": [
                {
                  "enemyKill": {
                    "enemies": [
                      [
                        "Green Space Pirate (standing)",
                        "Green Space Pirate (standing)"
                      ],
                      [
                        "Green Space Pirate (standing)",
                        "Green Space Pirate (standing)"
                      ]
                    ],
                    "excludedWeapons": [
                      "Missile"
                    ]
                  }
                },
                {
                  "resourceMissingAtMost": [
                    {
                      "type": "Missile",
                      "count": 0
                    }
                  ]
                },
                {
                  "partialRefill": {
                    "type": "ReserveEnergy",
                    "limit": 20
                  }
                }
              ]
            },
            {
              "and": [
                {
                  "enemyKill": {
                    "enemies": [
                      [
                        "Beetom",
                        "Beetom"
                      ]
                    ],
                    "excludedWeapons": [
                      "PowerBomb"
                    ]
                  }
                },
                {
                  "resourceMissingAtMost": [
                    {
                      "type": "PowerBomb",
                      "count": 0
                    }
                  ]
                },
                {
                  "partialRefill": {
                    "type": "ReserveEnergy",
                    "limit": 10
                  }
                }
              ]
            }
          ]
        }
      ]
    }
  ]
}
{
  "or": [
    {
      "canShineCharge": {
        "usedTiles": 12,
        "openEnd": 0
      }
    },
    {
      "and": [
        {
          "or": [
            {
              "doorUnlockedAtNode": 3
            },
            {
              "doorUnlockedAtNode": 4
            }
          ]
        },
        {
          "canShineCharge": {
            "usedTiles": 13,
            "openEnd": 0
          }
        }
      ]
    },
    {
      "and": [
        {
          "doorUnlockedAtNode": 3
        },
        {
          "doorUnlockedAtNode": 4
        },
        {
          "canShineCharge": {
            "usedTiles": 14,
            "openEnd": 0
          }
        }
      ]
    }
  ]
}
{
  "autoReserveTrigger": {
    "maxReserveEnergy": 95
  }
}
"canRModeSparkInterrupt"

Unlocks doors:

{"nodeId":3,"types":["ammo"],"requires":[]}
{"nodeId":4,"types":["ammo"],"requires":[]}