12

Gain a shinecharge by running right-to-left on the underwater runway on the right side of the room. Use HiJump or a Spring Ball jump to quickly exit the water to the left and spark up.

Requires:

"Gravity",
{"or": [
  "HiJump",
  "canTrickySpringBallJump",
  "canWallJump",
  {"and": [
    "canGravityJump",
    "canShinechargeMovementTricky"
  ]}
]},
{"enemyKill": {
  "enemies": [["Owtch", "Owtch"]]
}},
"canShinechargeMovementComplex",
{"canShineCharge": {
  "usedTiles": 16,
  "gentleUpTiles": 2,
  "gentleDownTiles": 2,
  "steepUpTiles": 1,
  "steepDownTiles": 1,
  "startingSteepDownTiles": 1,
  "startingGentleDownTiles": 2,
  "openEnd": 2
}},
{"shinespark": {"frames": 43, "excessFrames": 3}}

Dev note: FIXME: It's technically possible to evade the Owtches without killing them, but it's unclear if this can be done reliably. A 2->5 shinespark strat from here can also be added, using less energy than the existing strat that uses the runway at the bottom of the room.