Kill or freeze the pirate then crouch jump and down grab or use another method to get to the ledge.

Requires:

"canSuitlessMaridia",
"Plasma",
{"or": [
  "HiJump",
  "canSpringBallJumpMidAir",
  "h_underwaterCrouchJumpDownGrab",
  "canUseFrozenEnemies"
]}