Fire a charged Plasma shot, then use X-Ray repeatedly while the shot is in contact with Draygon, to wait out Draygon's i-frames. It is possible to one-cycle, which is easiest with a full beam, alternatively, it is possible to Morph under the swoop and two-cycle it. Note that if Samus is crouched when Draygon dies, she will stand up; this can be used to see when the fight has ended.

Requires:

"h_navigateUnderwater"
{
  "or": [
    {
      "and": [
        "canTrickyDodgeEnemies",
        {
          "or": [
            "Gravity",
            "canInsaneJump",
            {
              "enemyDamage": {
                "enemy": "Draygon",
                "type": "turretProjectile",
                "hits": 1
              }
            }
          ]
        }
      ]
    },
    "h_breakThreeDraygonTurrets"
  ]
}
"canXRayWaitForIFrames"
"Charge"
"Plasma"
{
  "or": [
    "canTrickyDodgeEnemies",
    "Morph",
    {
      "and": [
        "Ice",
        "Wave"
      ]
    },
    {
      "enemyDamage": {
        "enemy": "Draygon",
        "type": "contact",
        "hits": 1
      }
    }
  ]
}

Clears obstacles: f_DefeatedDraygon

Sets flags: f_DefeatedDraygon