Use the full runway of the top-right door to jump to the ledge below the Cacatac and mockball on it. Either full jump from the left side of this platform, or do a small hop followed by a big jump to cross the gap. Disabling Springball once past the Grapple Blocks makes this much easier.

Requires:

"canCarefulJump"
"canSpringBallBounce"
"canMockball"
{
  "or": [
    {
      "doorUnlockedAtNode": 7
    },
    "canTrickyJump"
  ]
}