Any beam can kill the Atomics by aiming for the seam in the glass. The drop may be hard to collect; try spin jumping along the side of the glass.

Requires:

{
  "not": "f_DefeatedPhantoon"
}
"canRiskPermanentLossOfAccess"
{
  "resetRoom": {
    "nodes": [
      1
    ]
  }
}
"canDodgeWhileShooting"
{
  "or": [
    {
      "and": [
        "Plasma",
        {
          "cycleFrames": 1020
        }
      ]
    },
    {
      "and": [
        "Wave",
        {
          "cycleFrames": 960
        }
      ]
    },
    {
      "and": [
        "Spazer",
        {
          "cycleFrames": 1400
        }
      ]
    }
  ]
}

Resets obstacles: R-Mode

Farm cycle drops: 4 Trapped Atomic

Dev note: Other options should just farm the Covern.