Use the runway on the upper screen. There are many enemies up there to clear out of the way and will helpfully provide Reserves. Or else Crystal Flash. Leave one waver or small hopper alive. You can farm the rest for drops.

Entrance condition:

{
  "comeInWithRMode": {}
}

Requires:

{
  "or": [
    "canWalljump",
    "HiJump",
    "SpaceJump",
    "canIBJ",
    "canSpringBallJumpMidAir",
    "h_crouchJumpDownGrab"
  ]
}
{
  "or": [
    "h_CrystalFlashForReserveEnergy",
    {
      "and": [
        {
          "disableEquipment": "ETank"
        },
        {
          "resourceAvailable": [
            {
              "type": "Energy",
              "count": 80
            }
          ]
        },
        {
          "resourceMissingAtMost": [
            {
              "type": "Missile",
              "count": 0
            }
          ]
        },
        {
          "resourceMissingAtMost": [
            {
              "type": "Super",
              "count": 0
            }
          ]
        },
        {
          "partialRefill": {
            "type": "ReserveEnergy",
            "limit": 1
          }
        }
      ]
    }
  ]
}
{
  "canShineCharge": {
    "usedTiles": 25,
    "openEnd": 1
  }
}
{
  "autoReserveTrigger": {
    "maxReserveEnergy": 95
  }
}
"canRModeSparkInterrupt"

Clears obstacles: A