Crouch at the edge of the overhang. Jump and just after the peak of the jump, grapple to the grapple blocks. This strat is finicky, and failure doesn't usually allow a second try (assuming the Powamp is not there). This is possible to do without a crouch jump, but it is much harder.

Requires:

"canSuitlessMaridia"
"canPreciseGrapple"
{
  "or": [
    "canCrouchJump",
    "canTrickyJump"
  ]
}